Mehlala ea lipotso mabapi le mocheso le mocheso

Mehlala e 15 ea Lipotso tsa Mocheso le Mocheso

Tekanyo ea Thermometer

1. Thermometer e lekantsweng X e bontsha -30^o sebakeng sa ho hoama ha metsi le 90^o mocheso oa metsi a belang. 60^oX e lekana le …

A. 20 ^oC

B. 45 ^oC

C. 50 ^oC

D. 75 ^oC

E. 80 ^oC

Puisano

Hoa tsebahala hore:

Sebaka sa ho hatsela sa metsi ho thermometer X = -30^o

Tekanyo ea metsi a belang ho thermometer X = 90^o

O botsitse: 60^oX = ….. ^oC

Karabo:

Ka tekanyo ea Fahrenheit, ntlha ea ho hoama ea metsi ke 32^oF 'me ntlha ea ho belisa ea metsi ke 212^oF. Ho na le phapang ea 212 pakeng tsa ntlha ea ho hoama le ntlha ea ho belisa ea metsi^o - 32^o = 180^o.

Ka tekanyo ea Celsius, ntlha ea ho hoama ea metsi ke 0^oC 'me ntlha ea ho belisa ea metsi ke 100^oC. Ho na le phapang ea 100°C pakeng tsa ntlha ea ho hoama le ntlha ea ho belisa ea metsi.^o - 0^o = 100^o.

Ka sekaleng sa X, ntlha ea ho hoama ea metsi ke -30^oX 'me ntlha ea ho belisa ea metsi ke 90^oX. Ho na le phapang ea 90 pakeng tsa ntlha ea ho hoama le ntlha ea ho belisa ea metsi^o – (-30^o= 90^o + 30^o = 120^o.

Fetolela sekala sa X ho ea ho sekala sa Celsius:

Karabo e nepahetseng ke D.

Katoloso

2. Setene sa tšepe se futhumatsoa ho fihlela mochesong oa likhato tse 80^oBolelele ba C bo fetoha 115 cm. Haeba coefficient ea katoloso e otlolohileng ea tšepe e le 3.10^{-3 o}C^-1 'me mocheso oa pele oa tšepe ke 30^oC, joale bolelele ba pele ba tšepe ke….

A. 100 cm

B. 101,5 cm

Bolelele ba lisenthimithara tse 102

D. 102,5 cm

E. 103 cm

Puisano

Hoa tsebahala hore:

Mocheso oa pele (T)₁= 30^oC

Mocheso oa ho qetela (T)₂= 80^oC

Phetoho ea mocheso (ΔT) = 80^oC - 30^oEA-50-C^oC

Palo ea katoloso e otlolohileng ea tšepe (α) = 3.10^{-3 o}C^-1

Bolelele ba ho qetela ba tšepe (L) = 115 cm

O botsitse: Bolelele ba pele ba tšepe (L)_o)

Karabo:

Foromo ea katoloso ea bolelele:

Karabo e nepahetseng ke A.

3. Thupa ea koporo qalong e bolelele ba 40 cm. Ha e futhumatsoa mochesong oa 80^oBolelele ba C bo fetoha 40,04 cm. Haeba coefficient ea katoloso e otlolohileng ea koporo e le 2,0 x 10^{-5 o}C^-1 Kahoo mocheso oa pele oa molamu oa koporo ke….

A. 20 ^oC

B. 22 ^oC

C. 25 ^oC

D. 30 ^oC

E. 50 ^oC

Puisano

Hoa tsebahala hore:

Mocheso oa ho qetela (T)₂= 80^oC

Bolelele ba qalong (L)_o) = 40 cm

Bolelele ba ho qetela (L) = 40,04 cm

Keketseho ea bolelele (ΔL) = 40,04 cm – 40 cm = 0,04 cm

Palo ea katoloso e otlolohileng ea koporo (α) = 2,0 x 10^{-5 o}C^-1

O botsitse: Mocheso oa pele (T)₁)

Karabo:

Foromo ea katoloso ea tšepe:

0,04 = (2,0 x 10)^-5)(40)(80 – T₁)

0,04 = (80 x 10)^-5)(80 – T₁)

0,04 = 0,0008 (80 – T₁)

0,04 = 0,064 – 0,0008 T₁

0,0008 T₁ = 0,064 - 0,040

0,0008 T₁ = 0,024

T₁ = 30^oC

Karabo e nepahetseng ke D.

Phetiso ea Mocheso ka ho Tsamaisa Mocheso

4. Lithupa tsa tšepe tsa boholo bo lekanang, empa li entsoe ka litšepe tse fapaneng, lia kopanngoa joalo ka ha ho bontšitsoe setšoantšong se ka tlase. Haeba ho khanna ha mocheso oa tšepe I ho feta ho khanna ha tšepe II ka makhetlo a mane, joale mocheso o kopanang le litšepe tse peli ke…

A. 45⁰ C

B. 40⁰ C

C. 35⁰ C

D. 30⁰ C

E. 25⁰ C

Puisano

Hoa tsebahala hore:

Boholo bo lekanang ba kutu

Ho khanna ha tšepe ka mocheso I = 4k

Ho khanna ha tšepe ka mocheso II = k

Mocheso oa ntlha ea tšepe I = 50⁰ C

Mocheso oa ntlha ea tšepe II = 0⁰ C

O botsitse: Mocheso moo litšepe tse peli li kopanang teng

Karabo:

Foromo ea sekhahla sa phetiso ea mocheso ka ho khanna:

Tlhaloso: Q/t = sekhahla sa phetisetso ya mocheso, k = conductivity ya mocheso, A = sebaka sa bokaholimo, T₁-T₂ = phetoho mochesong, l = bolelele ba thupa

Mocheso moeling oa moeli P le Q:

Lithupa tse peli tsa tšepe A le B li lekana ka boholo kahoo sebaka sa bokaholimo (A) le bolelele (l) ba lithupa li tlosoa ho equation.

Karabo e nepahetseng ke B.

5. Ela hloko polelo e latelang!

(1) Ho tsamaisa motlakase ka tšepe

(2) Phapang ea mocheso lipakeng tsa lipheletso tsa tšepe

(3) Bolelele ba tšepe

(4) Boima ba tšepe

Mabaka a etsang qeto ea sekhahla sa ho ata ha mocheso tšepeng ke...

A. (1), (2) le (3)

B. (1) le (4)

C. (2) le (4)

D. (3) le (4)

E. (4) feela

Puisano

Ho latela foromo ea sekhahla sa phetiso ea mocheso ka phetiso ea motlakase, lintlha tse khethollang sekhahla sa phetiso ea mocheso ke phetiso ea motlakase ea tšepe (k), phapang ea mocheso lipakeng tsa lipheletso tsa tšepe (T) le bolelele ba tšepe (l). Boima ba tšepe ha bo na phello.

Karabo e nepahetseng ke A.

6. Lithupa tse peli tsa PQ tsa boholo bo lekanang, empa mefuta e fapaneng ea tšepe e hoketsoe joalo ka ha ho bontšitsoe setšoantšong se ka tlase. Haeba coefficient ea conduction ea mocheso P e le coefficient ea conduction ea mocheso habeli Q, joale mocheso moeling o pakeng tsa P le Q ke...

A. 84°C

B. 78°C

C. 72°C

D. 70°C

E. 90°C

Puisano

Hoa tsebahala hore:

Lithupa tsa PQ li na le boholo bo lekanang.

Coefficient ea ho khanna mocheso oa tšepe P (k)_P) = 2k

Coefficient ea ho khanna mocheso oa tšepe Q (k)_Q) = k

O botsitse: Mocheso moeling oa moeli P le Q

Karabo:

Foromo ea sekhahla sa phetiso ea mocheso ka ho khanna:

Tlhaloso: Q/t = sekhahla sa phetisetso ya mocheso, k = conductivity ya mocheso, A = sebaka sa bokaholimo, T₁-T₂ = phetoho mochesong, l = bolelele ba thupa

Mocheso moeling oa moeli P le Q:

Liropo tsa PQ li lekana ka boholo kahoo A le l lia tlosoa ho equation.

Ha ho karabo e nepahetseng.

Phetoho ea Sebopeho

7. 1 kg ea leqhoa mochesong oa 0 ^oC e tsoakiloeng le 0,5 kg ea metsi mochesong oa 0 ^oC, ebe…

A. Metsi a mang aa hoama

B. leqhoa le leng lea qhibiliha

C. leqhoa lohle lea qhibiliha

D. metsi 'ohle aa hoama

E. boima ba leqhoa ka metsing bo lula bo tsitsitse

Puisano

Lentsoe leqhoa le bolela metsi a tiileng, ha lentsoe metsi le bolela metsi a metsi.

Ka mocheso oa 0^oLeqhoa le fetoha ho tloha ho le tiileng ho ea ho le metsi. Hore leqhoa le fetohe boemo, mocheso o lokela ho monngoa ke leqhoa. Leqhoa le kopanngoa le metsi, kahoo leqhoa le lokela ho monya mocheso o tsoang metsing. Leha ho le joalo, mocheso oa metsi le oona ke 0°C.^oC e le hore ho se ke ha e-ba le mocheso o ka monngoang ke leqhoa. Kahoo, boima ba leqhoa ka metsing bo lula bo tsitsitse.

Karabo e nepahetseng ke E.

Molao-motheo o Motšo

8. Ka sejaneng sa tšepe se boima ba digrama tse 200 ho na le digrama tse 100 tsa oli mochesong wa di-degrees tse 20 ^oC. Ligrama tse 50 tsa tšepe mochesong oa 75 li kenngoa ka sejaneng. ^oC. Haeba mocheso oa sekepe o nyoloha ka likhato tse 5^oC le mocheso o itseng oli = 0,43 cal/g ^oC, joale mocheso o itseng oa tšepe ke...

A. 0,143 cal/g ^oC

B. 0,098 cal/g ^oC

C. 0,084 cal/g ^oC

D. 0,075 cal/g ^oC

E. 0,064 cal/g ^oC

Puisano

Hoa tsebahala hore:

Boima ba sejana sa tšepe (m) = 200 gr

Mocheso oa pele oa sejana sa tšepe (T)₁= 20^oC

Oli e ka sejaneng sa tšepe kahoo mocheso oa oli = mocheso oa sejana sa tšepe.

Mocheso oa ho qetela oa sejana sa tšepe (T)₂= 20^oC + 5^oEA-25-C^oC

Boima ba oli (m) = 100 grams

Mocheso o itseng oa oli (oli ea c) = 0,43 cal/g ^oC

Mocheso oa pele oa oli (T)₁= 20^oC

Oli e ka sejaneng e le hore oli e be maemong a mocheso le sejana sa tšepe. Kahoo haeba mocheso oa ho qetela oa sejana sa tšepe e le 25^oC joale mocheso oa ho qetela oa oli ke 25^oC.

Mocheso oa ho qetela oa oli (T)₂= 20^oC + 5^oEA-25-C^oC

Boima ba tšepe (m) = 50 dikgerama

Mocheso oa pele oa tšepe (T)₁= 75^oC

Tšepe e qoelisoa ka har'a oli ka har'a sejana, kahoo tšepe e ba maemong a mocheso le oli le sejana. Kahoo haeba mocheso oa ho qetela oa sejana e le 25^oC joale mocheso oa ho qetela oa tšepe ke 25^oC.

O botsitse: Mocheso o itseng oa tšepe (c tšepe)

Karabo:

Mocheso o lokolloang ke tšepe:

Q = mc ΔT = (50)(c)(75-25) = (50)(c)(50) = 2500c lik'hilojule

Mocheso o monngoang ke sejana sa tšepe:

Q = mc ΔT = (200)(c)(25-20) = (200)(c)(5) = 1000c lik'hilojule

Mocheso o monngoang ke oli:

Q = mc ΔT = (100)(0,43)(25-20) = (43)(5) = dikhalori tse 215

Molao-motheo oa Black o bolela hore tsamaisong e koetsoeng, e arohaneng, mocheso o lokolloang ke ntho e nang le mocheso o phahameng o monngoa ke ntho e nang le mocheso o tlase.

Q e lokollotsoe = Q e monyehile

2500c = 1000c + 215

2500c – 1000c = 215

1500c = 215

c = 215/1500

c = 0,143 cal/g ^oC

Karabo e nepahetseng ke A.

9. Khalase e nang le digrama tse 200 tsa metsi mochesong wa 20°C e tlatswa ka digrama tse 50 tsa leqhoa mochesong wa -2°C. Haeba ho etsahala phapanyetsano ya mocheso feela pakeng tsa metsi le leqhoa, kamora hore tekano e fihlellehe, tse latelang di tla fumanwa: (c metsi = 1 cal/gr°C; c_es = 0,5 cal/gr°C; L = 80 cal/gr)

A. leqhoa lohle lea qhibiliha 'me mocheso o kaholimo ho 0°C

B. leqhoa lohle lea qhibiliha 'me mocheso ke 0°C

C. Hase leqhoa lohle le qhibilihang 'me mocheso ke 0°C

D. mocheso oa sistimi eohle o ka tlase ho 0°C

E. metsi a mang aa hoama 'me mocheso oa sistimi ke 0°C

Puisano

Hoa tsebahala hore:

Boima ba metsi (m_moya) = digrama tse 200

Thempereichara ea metsi (T)_moya= 20^oC

Mocheso o itseng oa metsi (c_moya) = 1 cal/gr°C

Boima ba leqhoa (m_es) = digrama tse 50

Thempereichara ea leqhoa (T)_es) = -2^oC

Mocheso o itseng oa leqhoa (c_es) = 0,5 cal/gr°C

Mocheso oa metsi a qhibilihang (L) = 80 cal/gr

Karabo:

Mocheso ho phahamisa mocheso oa leqhoa ho tloha ho -2^oHo tloha ho C ho isa ho 0^oC:

Q = mc ΔT

Q = (50 gram)(0,5 cal/gr°C)(0^oC – (-2)^oC))

Q = (50)(0,5 cal)(2)

Q = lik'hilojule tse 50

Futhumatsa ho qhibilihisa leqhoa lohle ka metsing:

Q = m L = (ligrama tse 50)(80 cal/gram) = lik'hilojule tse 4000

Futhumatsa ho fokotsa mocheso oa metsi ohle ho tloha ho likhato tse 20^oHo tloha ho C ho isa ho 0^oC:

Q = mc ΔT

Q = (200 gram)(1 cal/gr°C)(0^oC – (20)^oC))

Q = (200)(1 cal)(-20)

Q = -4000 lik'hilojule

Letšoao le letle le bolela hore mocheso o ekelitsoe, letšoao le letle le bolela hore mocheso o lokollotsoe.

Mocheso ho phahamisa mocheso oa leqhoa ho 0^oC ke lik'hilojule tse 50, 'me mocheso o hlokahalang ho qhibilihisa leqhoa lohle ke lik'hilojule tse 4000. Kahoo, mocheso oohle o hlokahalang ho qhibilihisa leqhoa lohle ke lik'hilojule tse 4050. Mocheso o fumanehang ke mocheso o lokolloang ke metsi, e leng lik'hilojule tse 4000.

Ho ka fihlelwa qeto ea hore mocheso o fumanehang ha oa lekana ho qhibilihisa leqhoa lohle hore e be metsi. Bongata ba leqhoa bo qhibilihile hore e be metsi, empa karolo e nyane ha ea qhibiliha. Metsi ana le leqhoa le setseng li mochesong oa 0°C.^oC.

Karabo e nepahetseng ke C.

10. Karolo ea aluminium e boima ba ligrama tse 200 mochesong oa likhato tse 20^oC e kenngoa ka sejaneng sa metsi se nang le boima ba ligrama tse 100 le mocheso oa 80^oC. Haeba mocheso o itseng oa aluminium o tsejoa e le 0,22 cal/g ^oC 'me mocheso o itseng oa metsi ke 1 cal/g ^oC, joale mocheso oa ho qetela oa aluminium o haufi le…

A. 20^oC

B. 42^oC

C. 62^oC

D. 80^oC

E. 100^oC

Puisano

Hoa tsebahala :

Boima ba aluminium = 200 grams

Mocheso oa aluminium = 20^oC

Boima ba metsi = digrama tse 100

Mocheso oa metsi = 80^oC

Mocheso o itseng oa aluminium = 0,22 cal/g ^oC

Mocheso o itseng oa metsi = 1 cal/g ^oC

E botsitsoe : mocheso oa ho qetela oa aluminium

Jawab :

Aluminium e ka metsing kahoo mocheso oa ho qetela oa aluminium = mocheso oa ho qetela oa metsi.

Mocheso o ntshwang ke metsi a mocheso o phahameng (Q e ntshwang) = mocheso o ntshwang ke aluminium ya mocheso o tlase (Q e ntshwang)

m_moya c (ΔT) = m_aluminium c (ΔT)

(100)(1)(80 – T) = (200)(0,22)(T – 20)

(100)(80 – T) = (44)(T – 20)

8000 – 100T = 44T – 880

8000 + 880 = 44T + 100T

8880 = 144T

T = 62^oC

Karabo e nepahetseng ke C.

11. Chelete ea tšepe e boima ba 50 g mochesong oa 85 °C e qoelisoa ka har'a 50 g ea metsi mochesong oa 29,8 °C (mocheso o itseng oa metsi = 1 cal.g) ^-1 .°C^-1 Haeba mocheso oa ho qetela e le 37 °C 'me setshelo se sa monye mocheso, joale mocheso o itseng oa tšepe ke…

A. 0,15 cal.g ^-1 .°C^-1

B. 0,30 cal.g ^-1 .°C^-1

C. 1,50 cal.g ^-1 .°C^-1

D. 4,8 cal.g ^-1 .°C^-1

E. 7,2 cal.g ^-1 .°C^-1

Puisano

Hoa tsebahala :

Boima ba tšepe (m_logam) = digrama tse 50

Mocheso oa tšepe = 85^oC

Boima ba metsi (m_moya) = digrama tse 50

Mocheso oa metsi = 29,8^oC

Mocheso o itseng oa metsi (c_moya) = 1 cal.g ^-1 .°C^-1

Mocheso oa ho qetela oa motsoako = 37^oC

E botsitsoe : mocheso o itseng oa tšepe (c tšepe)

Jawab :

Mocheso o lokolloang ke tšepe e mocheso o phahameng (Q e lokollotsoeng) = mocheso o monngoang ke metsi a mocheso o tlase (Q e monngoang)

m_logam c (ΔT) = m_moya c (ΔT)

(50)(c)(85 - 37) = (50)(1)(37 - 29,8)

(c)(85 - 37) = (1)(37 - 29,8)

48 c = 7,2

c = 0,15 cal.g ^-1 .°C^-1

Karabo e nepahetseng ke A.

12. Leqhoa la 50 gram ho 0°C le qoelisoa ka har'a ligrama tse 200 tsa metsi ho 30°C le beoa ka setshelong se khethehileng. Nka hore setshelo ha se monye mocheso. Haeba mocheso o itseng oa metsi e le 1 cal.g^{- 1} ° C ^-1 'me mocheso oa ho kopana ha leqhoa ke 80 cal.g ^-1, ebe mocheso oa ho qetela oa motsoako ke….

A. 5°C

B. 8°C

C. 11°C

D. 14°C

E. 17°C

Puisano

Hoa tsebahala :

Boima ba leqhoa (m_es) = digrama tse 50

Mocheso oa leqhoa = 0°C

Boima ba metsi (m_moya) = digrama tse 200

Mocheso oa metsi = 30^oC

Mocheso o itseng oa metsi (c_moya) = 1 cal.g^{- 1} ° C ^-1

Mocheso oa ho kopana ha leqhoa (L)_es) = 80 cal.g ^-1

E botsitsoe : mocheso oa ho qetela oa motsoako

Jawab :

Qala ka ho hakanya boemo ba ho qetela:

Mocheso o lokolloang ke metsi ho theola mocheso oa oona ho tloha ho likhato tse 30^oHo tloha ho C ho isa ho 0^oC:

Q_tima = m_moya c_moya (ΔT) = (200)(1)(30-0) = (200)(30) = 6000

Mocheso o hlokahalang ho qhibilihisa leqhoa lohle:

Q_mosebetsi = m_es L_es = (50)(80) = 4000

Mocheso o sebediswang ho qhibilihisa leqhoa lohle ke 4000 feela ha mocheso o fumanehang e le 6000. Ho ka fihlellwa qeto ya hore mocheso wa ho qetela wa motswako o ka hodimo ho 0^oC.

Molao-motheo o Motšo :

Mocheso o lokolloang ke metsi = mocheso o qhibilihisang leqhoa lohle + mocheso o phahamisang mocheso oa metsi a leqhoa

(m_moya)(c_moya)(ΔT) = (m_es)(L_es) + (m_es)(c_moya)(ΔT)

(200)(1)(30-T) = (50)(80) + (50)(1)(T-0)

(200)(30-T) = (50)(80) + (50)(T-0)

6000 – 200T = 4000 + 50T – 0

6000 – 4000 = 50T + 200T

2000 = 250T

T = 2000/250

T = 8^oC

Karabo e nepahetseng ke B.

Liphetoho boemong ba taba

13. Kerafo e ka tlase e bonts'a kamano pakeng tsa mocheso (T) le mocheso (Q) o sebelisitsoeng ho gram e le 'ngoe ea ntho e tiileng. Palo ea mocheso oa mouoane oa ntho e tiileng ke…
A. Likhalori tse 60/grama
B. Likhalori tse 70/grama
C. Likhalori tse 80 ka gram
D. 90 lik'hilojule/grama
E. Likhalori tse 100/grama
Puisano:Mocheso oa mouoane ke bongata ba mocheso o monngoang (kapa o lokolloang) ke gram e le 'ngoe ea ntho ho fetola boemo ba eona ho tloha ho mokelikeli ho ea ho khase (kapa ho tloha ho khase ho ea ho mokelikeli).
Hoa tsebahala :
Mocheso o monngoa kapa o lokollotsoeng: Q = lik'hilojule tse 140 – lik'hilojule tse 60 = lik'hilojule tse 80
Boima ba ntho e tiileng: m = 1 gram
E botsitsoe :
Mocheso oa mouoane (L)_v) lintho tse tiileng?
Jawab :
Foromo ea ho fumana mocheso oa mouoane :
Q = m L_v
Tlhaloso: Q = mocheso o monyelang kapa o lokollotsoeng, m = boima ba ntho, L_v = mocheso oa mouoane
L_v = Q / m
L_v = Likhalori tse 80 / gram e le 1
L_v = Likhalori tse 80/grama
Karabo e nepahetseng ke C.

14. Ka tlase ke kerafo ya mocheso kgahlanong le mocheso wa 1 kg ya mouoane kgatellong e tlwaelehileng. Boemo ba ho belisa ba metsi ke 2256 x 10³ J/kg mme mocheso o itseng wa metsi ke 4,2 x 10³ J/kg K, ebe mocheso o lokollwang phetohong ho tloha mouoaneng ho ya metsing ke…
A. 4,50 × 10³ Joule
B. 5,20 × 10³ Joule
C. 2,00 × 10⁶ Joule
D. 2,26 × 10⁶ Joule
E. 4,40 × 10⁶ Joule

Puisano:
Hoa tsebahala :
Mocheso o chesang ka mouoane kapa mocheso o belang (L)_v) = 2.256 x 10³ J / lik'hilograma
Mocheso o itseng oa metsi (c) = 4200 J/kg K
Boima ba mouoane (m) = 1 kg
E botsitsoe :
Mocheso o lokollotsoe (Q)?
Jawab :
Q = m L_v
Q = (1 kg)(2.256 x 10³ J/kg)
Q = 2256 x 10³ Joule
Q = 2,256 x 10⁶ Joule
Karabo e nepahetseng ke D.

15. Palo ea mocheso o monngoang ho phahamisa mocheso oa 2 kg ea metsi ho tloha ho -2 ^oHo tloha ho C ho isa ho 10 ^oC ke… Mocheso o itseng oa metsi = 4.200 J/kg C^o, mocheso o itseng oa leqhoa = 2.100 J/kg C^o, mocheso oa ho kopana ha metsi (L_F) = 334.000 J/kg
A. 760.400 J
B. 750.000 J
C. 668.000 J
D. 600.000 J
E. 540.000 J
Puisano:
Hoa tsebahala :
Boima ba metsi (m) = 2 kg
Mocheso oa pele (T) = -2 ^oC
Mocheso oa ho qetela (T) = 10 ^oC
Mocheso o itseng oa leqhoa (c es) = 2100 J/kg C^o
Mocheso o itseng oa metsi (c metsi) = 4200 J/kg C^o
Mocheso oa ho kopana ha metsi (L)_F) = 334.000 J/kg
E botsitsoe :
Mocheso o monyehileng (Q)?
Jawab :
Phetoho ea mocheso ho tloha ho -2 ^oHo tloha ho C ho isa ho 10 ^oC e feta mekhahlelong e 'maloa.
Mokhahlelo oa 1, mocheso oa leqhoa o eketseha ho tloha ho -2 ^oHo tloha ho C ho isa ho 0 ^oC (keketseho ea mocheso oa leqhoa e emisa moo metsi a batang, e leng 0 ^oC)
Mokhahlelo oa 2, leqhoa lohle lea qhibiliha (boemo ba ho tiea bo fetoha boemong ba metsi mochesong oa ntlha ea ho hoama oa metsi, e leng 0 ^oC)
Mokhahlelo oa 3, mocheso oa metsi o eketseha hape ho tloha ho 0 ^oHo tloha ho C ho isa ho 10 ^oC)
Kahoo ho tloha mochesong oa -2 ^oHo tloha ho C ho isa ho 0 ^oC, metsi a ntse a le boemong bo tiileng. Mochesong oa 0 ^oC, ho etsahala phetoho ho tloha ho tiileng ho ea ho metsi. Kamora hore boemo bo tiileng bo fetohe ho ea boemong ba metsi, mocheso oa metsi o eketseha hape ho tloha ho 0 ^oHo tloha ho C ho isa ho 10 ^oC.
Q₁ = (m)(c es)(delta T) = (2 kg)(2100 J/kg C^o(0) ^oC – (-2) ^oC)) = (2)(2100 J)(2) = 8400 J
Q₂ = (m)(L_F) = (2 lik'hilograma)(334.000 J/kg) = 668.000 J
Q₃ = (m)(c metsi)(delta T) = (2 kg)(4200 J/kg C^o(10) ^oC - 0 ^oC)) = (2)(4200 J)(10) = 84000 J
Mocheso o monyehileng:
P = P₁ +Q₂ +Q₃
Q = 8400 J + 668.000 J + 84000 J
Q = 760.400 Joule
Karabo e nepahetseng ke A.

Mohloli oa lipotso:

Lipotso tsa Fisiks tsa Tlhahlobo ea Naha bakeng sa Sekolo se Phahameng sa Thuto e Phahameng/Sekolo se Phahameng sa Mosebetsi