Mohlala oa phetiso ea mocheso ka ho tsamaisa motlakase

Mehlala e 8 ea phetiso ea mocheso ka ho tsamaisa motlakase

1. Hlalosa ka ho sebelisa mehlala, moelelo phetiso ea mocheso ka ho tsamaisa ?
Puisano
Phetiso ea mocheso ka ho tsamaisa ke phetiso ea mocheso e etsahalang ka ho thulana pakeng tsa liathomo/limolek'hule tse etsang ntho. Mohlala, nahana ka tšepe e futhumalitsoeng. Ntlheng e 'ngoe ea tšepe e angoa ke lelakabe 'me ntlha e 'ngoe ea tšoaroa. Leha ntlha ea tšepe e tšoeroeng e sa kopane le lelakabe, hobane mocheso o fetisetsoa ka tšepe, ntlha ea tšepe e tšoeroeng e ikutloa e chesa. Mocheso o fetela joang ho tloha pheletsong e 'ngoe ea tšepe ho ea ho e 'ngoe?
Ntlheng ea tšepe e futhumetseng e fumana mocheso o eketsehileng. Likhalori ke matla a tsamayang ka tlhaho ho tloha dinthong tse nang le mocheso o phahameng ho ya dinthong tse nang le mocheso o tlase. Matla a ekeditsweng a etsa hore diathomo/dimolekule tse etsang tshepe di thothomele ho tloha boemong ba tsona ba tekano. Ha di ntse di thothomela ho ya pele, diathomo/dimolekule di thulana le diathomo/dimolekule tse haufi, e leng se etsang hore diathomo/dimolekule di thothomele ho ya pele mme di fumane matla a mangata. Tshebetso ena e tswela pele ho fihlela mocheso o fihla ntlheng ya tshepe e tshwerweng.

2. Na hoa khoneha hore phetiso ea mocheso ka ho tsamaisa e etsahale pakeng tsa liathomo/limolek'hule tsa mokelikeli?
Puisano
Nahana ka mohlala o latelang. Ha tšepe e futhumatsoa, ​​mocheso o tloha athomong/molek'huleng e 'ngoe ea tšepe ho ea ho e 'ngoe, kahoo ho ka thoe phetiso ea mocheso ka ho tsamaisa e etsahala pakeng tsa liathomo/limolek'hule tsa ntho e tiileng. Phetiso ea mocheso ka ho tsamaisa ha e etsahale pakeng tsa liathomo/limolek'hule tsa mokelikeli hobane phetiso ea mocheso e etsahala pakeng tsa liathomo/limolek'hule tsa mokelikeli, 'me ka ho tšoanang pakeng tsa liathomo/limolek'hule tsa khase, phetiso ea mocheso e etsahala ka ho tsamaisa.

3. Ho khanna ha mocheso setene ke 0,84 J/msCo mme motlakase wa boya ke 0,040 J/msC^oKe sefe se betere se tsamaisang mocheso, setene kapa ulu?
Puisano
Lintho tse nang le phallo e phahameng ea mocheso ke li-conductor tse ntle tsa mocheso (li-conductor tse ntle tsa mocheso), ha lintho tse nang le phallo e tlase ea mocheso e le li-conductor tse fokolang tsa mocheso (li-conductor tse fokolang tsa mocheso).
Ho latela potso ena, ho tsamaisa mocheso ha setene ho feta ho tsamaisa mocheso ha ulu kahoo setene ke mokhanni o betere oa mocheso ho feta ulu.

4. Setene se tiileng sa tšepe se silindara se na le bolelele ba mithara e le 'ngoe le sebaka se tšekaletseng sa mithara e lisekoere tse 0,2. Phetisetso ea mocheso ea tšepe ke 40 J/msC^oHaeba phapang ea mocheso lipakeng tsa lipheletso tse peli tsa tšepe e le 10^oC, fumana sekhahla sa phetiso ea mocheso ka ho tsamaisa motlakase ka har'a molamu oa tšepe!
Puisano
Hoa tsebahala hore:
Bolelele ba tšepe (l) = 1 m
Sebaka sa tshepe se nang le karolo e tsheletseng (A) = 0,2 m²
Ho khanna ha tšepe ka mocheso (k) = 40 J/msC^o
Phapang ea mocheso lipakeng tsa lipheletso tse peli tsa tšepe (ΔT) = 10^oC
O botsitse: Sekhahla sa phetiso ea mocheso ka ho khanna (Q/t)
Karabo:
Foromo ea sekhahla sa phetiso ea mocheso ka ho khanna:
Q/t = k A ΔT / l
Q/t = (40)(0,2)(10) / 1
Q/t = 80/1
Q/t = 80 Joule/motsotsoana

5. Litšepe A le B li na le bolelele bo tšoanang le sebaka se tšekaletseng. Koefficient ea conductivity ea tšepe A ke 1/6 ea koefficient ea conductivity ea tšepe B. Litšepe ka bobeli li futhumatsoa pheletsong e 'ngoe 'me ka bobeli li na le phetoho e tšoanang ea mocheso. Ka hona, karolelano ea sekhahla sa phetisetso ea mocheso ea tšepe A le tšepe B ke...
K. 6: 1
B. 1: 6
C. 1: 5
D. 2: 1
E. 4: 1
Puisano:

Dtseba :
k_A = 1/6 k_B = 1 / 6
k_B = 6/6 = 1
E botsitsoe :
Papiso ea sekhahla sa phetiso ea mocheso ka tšepe A le tšepe B?
Jawab :
Foromo ea sekhahla sa phetiso ea mocheso ka ho khanna :
Tlhaloso: Q/t = sekhahla sa phetisetso ya mocheso, k = ho tsamaisa mocheso, A = sebaka sa karolo e tsheletseng, T₁ = mocheso o phahameng, T₂ = mocheso o tlase, l = bolelele ba ntho.

Bolelele le sebaka sa karolo e tšekaletseng ea litšepe tse peli li lekana kahoo l le A li tlosoa ho equation. Phetoho ea mocheso oa litšepe ka bobeli e tšoana hoo (T)₁ - T₂) e tloswa ho equation.
k_A :k_B
6/1: 6/6
1: 6
Karabo e nepahetseng ke B.

6. Di-solids tse pedi P le Q tse nang le boholo bo tshwanang empa mefuta e fapaneng di hoketswe jwalo ka ha ho bontshitswe setshwantshong se ka tlase. Haeba coefficient ya ho tsamaisa mocheso ya P e le coefficient ya ho tsamaisa mocheso ya Q ka makgetlo a mararo, jwale mocheso o moeding o pakeng tsa P le Q ke...
A. 60 ^oC
B. 50 ^oC
C. 40 ^oC
D. 20 ^oC
E. 10 ^oC

Puisano:
Hoa tsebahala :
T_P = 0 ^oC
T_Q = 80 ^oC
k_P = 3 k_Q = 3
k_Q = 1
E botsitsoe :
Mocheso moeling oa moeli P le Q?
Karabo:

Boholo ba lintho tse peli boa tšoana kahoo A le l lia tlosoa ho equation.
Karabo e nepahetseng ke D.

7. Palo ea mocheso o phallang ka motsotsoana ka har'a thepa ea tšepe:

(1) ho lekana ka tsela e fapaneng le phapang ea mocheso lipakeng tsa lipheletso tse peli

(2) e lekana ka tsela e fapaneng le sebaka se tšekaletseng sa ntho

(3) ho latela mofuta oa thepa ea tšepe

(4) e lekana ka tsela e fapaneng le bolelele ba tšepe

Polelo e nepahetseng ea ho eketsa sekhahla sa phetiso ea mocheso ka ho tsamaisa ke…

Puisano

Foromo ea phetiso ea mocheso ka ho tsamaisa:

Palo ea mocheso o phallang ka motsotsoana (Q/t)

E lekana hantle le phapang ea mocheso lipakeng tsa lipheletso tse peli (T ₁ - T ₂ ).

E lekana hantle le sebaka se tšekaletseng sa ntho (A).

E lekana ka ho toba le mofuta oa thepa ea tšepe (k = conductivity ea mocheso)

E lekana ka tsela e fapaneng le bolelele ba tšepe (l).

Lipolelo tse nepahetseng ke 3 le 4.

8. Litšepe P, Q, le R li lekana ka boholo. Ho tsamaisa ha litšepe P, Q, le R ke 4k, 2k, le k, ka ho latellana. Ka boraro ba tsona li hokahantsoe ke mocheso lipheletsong tse bulehileng joalo ka ha ho bontšitsoe setšoantšong se latelang.

Mocheso moo tšepe e kopanang teng P le Q (T _x ) ke...

Puisano

Hoa tsebahala:

Ho tsamaisa ha tšepe P = 4k

Ho tsamaisa tšepe Q = 2k

Ho khanna ha tšepe R = k

Mocheso o tlase pheletsong ea tšepe P (TP ₎ = 20 ^o C

Mocheso o phahameng ntlheng ea tšepe R (T _R ) = 160 ^o C

Ho batloa: Mocheso moo tšepe e kopanang teng P le Q (T _x )

Karabo:

Foromo ea phetiso ea mocheso ka ho tsamaisa:

Lintlha :

Q/t = sekgahla sa phetiso ya mocheso, k = ho tsamaisa mocheso, A = sebaka se tshekaletseng, T ₁ = mocheso wa pele, T ₂ = mocheso wa ho qetela, l = bolelele ba thupa.

Bolelele (l) le sebaka se nang le karolo e tsheletseng (A) di lekana kahoo di tloswa ho equation.

Sebelisa equation ena ho bala mocheso.

Nahana ka lithupa tsa tšepe P le Q.

Nahana ka melamu ea tšepe Q le R.

Ho fumana T _x , tlosa T _y :