Adana makamashi don canja wurin zafi - matsaloli da mafita

1. Ruwa kilogiram 1 a 100 oC a gauraya da ruwa kilogiram 1 a 10 oC a cikin tsarin da aka keɓe. Takamaiman zafin ruwan shine 4200 J/kg o C. A ƙayyade zafin ƙarshe na cakuda!

An sani:

Nauyin ruwan zafi (m 1 ) = 1 kg

Zafin ruwan zafi (T1 ) = 100 oC

Nauyin ruwan sanyi (m2 ) = 1 kg

Zafin ruwan sanyi (T2 ) = 10 oC

Ana so: Zafin jiki na ƙarshe (T)

Magani:

An rasa zafi = An sami zafi (tsarin da aka keɓe)

m c Δ T = m c Δ T

m Δ T = m Δ T

m 1 (T 1 – T) = m 2 (T – T 2 )

(1)(100 – T) = (1)(T – 10)

100 – T = T – 10

100 + 10 = T + T

110 = 2T

T = 110 / 2

T = 55

Zafin ƙarshe shine 55 o C.

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2. Tushen gubar mai nauyin kilogiram 3 a nauyin kilogiram 80o An sanya shi a cikin kilogiram 10 na ruwa. Takamaiman zafin gubar shine 1400 J.kg-1C-1 kuma takamaiman zafin ruwan shine 4200 J.kg-1C-1Zafin ƙarshe a cikin ma'aunin zafi shine 20oC. Ƙayyade zafin farko na ruwa!

An sani:

Nauyi (m 1 ) = 3 kg

Takamaiman zafin gubar (c1 ) = 1400 J.kg -1 C -1

Zafin gubar (T1 ) = 80 oC

Nauyin ruwa (m2 ) = 10 kg

Takamaiman zafin ruwa (c2 ) = 4200 J.kg -1 C -1

Zafin ma'aunin zafi ( T) = 20 oC

Ana so: Zafin ruwa na farko ( T2 )

Magani:

An rasa zafi = An sami zafi

Q gubar = Q ruwa

m 1 c 1 ΔT = m 2 c 2 ΔT

(3)(1400)(80-20) = (10)(4200)(20-T)

(4200)(60) = (42,000)(20-T)

252,000 = 840,000 – 42,000 T

42,000 T = 840,000 – 252,000

42,000 T = 588,000

T = 588,000 / 42,000

T = 14

Zafin ruwa na farko shine 14 oC.

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3. Toshe na tagulla a 100oC an zuba a cikin gram 128 na ruwa a cikin 30 oC. Takamaiman zafin ruwa shine 1 cal.g-1oC-1 kuma takamaiman zafin jan ƙarfe shine 0.1 cal.g-1oC-1. Idan zafin jiki na ma'aunin zafi ya kasance 36 oC, tantance nauyin jan ƙarfe!

An sani:

Zafin jan ƙarfe (T1 ) = 100 oC

Takamaiman zafin jan ƙarfe (c1 ) = 0.1 c al.g -1o C -1

Nauyin ruwa (m2 ) = gram 128

Zafin ruwa (T2 ) = 30 oC

Takamaiman zafin ruwa (c2 ) = 1 c al.g -1o C -1

Zafin ma'aunin zafi ( T) = 36 oC

Ana nema: Nauyin jan ƙarfe (m 1 )

Magani:

An rasa zafi = An sami zafi

Q jan ƙarfe = Q ruwa

m 1 c 1 ΔT = m 2 c 2 ΔT

(m 1 )(0.1)(100-36) = (128)(1)(36-30)

(m 1 )(0.1)(64) = (128)(1)(6)

(m 1 )(6.4) = 768

m 1 = 768 / 6.4

m 1 = 120

Nauyin jan ƙarfe shine gram 120.

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4. Tushen kankara na M-kg a 0oC an zuba a cikin gram 340 na ruwa a cikin 20oC a cikin kwalba. Idan zafin haɗuwa na ruwa = 80 kalori g-1, zafin ruwa na musamman shine 1 kalori g-1 oC-1. Duk kankara yana narkewa da kuma zafin jiki na thermal ma'auni is 5oC, tantance yawan kankara!

An sani:

Nauyin ruwa (m) = gram 340

Zafin kankara ( T kankara ) = 0 oC

Zafin ruwa ( T ruwa ) = 20 oC

Zafin ma'aunin zafi (T) = 5 oC

Zafin haɗa ruwa ( L ) = 80 c al g -1

Takamaiman zafin ruwa (c ruwa ) = 1 kalori g -1 o C -1

Ana nema: Nauyin kankara (M)

Magani:

An rasa zafi = An sami zafi

Ruwa Q = Q ice

m c ( ΔT) = m es L es + m c ( Δ T)

(340)(1)(20-5) = M (80) + M (1)(5-0)

(340)(15) = 80M + 5M

5100 = 85M

M = 5100/85

M = gram 60

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  1. Canza ma'aunin zafin jiki
  2. Fadada layin layi
  3. Faɗaɗa yanki
  4. Fadada ƙara
  5. Heat
  6. Daidaiton zafi na inji
  7. Ƙarfin zafi da zafi na musamman
  8. Zafin da ke ɓoye, zafin haɗuwa, zafin tururi
  9. Ajiye makamashi don canja wurin zafi

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