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When an aluminum bar is connected between a hot reservoir at 620 K and a cold reservoir at 358 K, 2.40 kJ of energy is transferred by heat from the hot reservoir to the cold reservoir. (a) In this irreversible process, calculate the change in entropy of the hot reservoir. (b) In this irreversible process, calculate the change in entropy of the cold reservoir. (c) In this irreversible process, calculate the change in entropy of the Universe, neglecting any change in entropy of the aluminum rod.

Question

When an aluminum bar is connected between a hot reservoir at 620 K and a cold reservoir at 358 K, 2.40 kJ of energy is transferred by heat from the hot reservoir to the cold reservoir.

 

(a) In this irreversible process, calculate the change in entropy of the hot reservoir.

 

(b) In this irreversible process, calculate the change in entropy of the cold reservoir.

 

(c) In this irreversible process, calculate the change in entropy of the Universe, neglecting any change in entropy of the aluminum rod.

check_circleAnswer
Step 1
Given Intormationg
Temperadure of the het tesovoi v Thz 620k
Temporature of the cold tescnuoir Te 358K
Heat transtoreed 24KJ.
Entropy change of oluminium rod is negligible
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Given Intormationg Temperadure of the het tesovoi v Thz 620k Temporature of the cold tescnuoir Te 358K Heat transtoreed 24KJ. Entropy change of oluminium rod is negligible

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Step 2
Change in entropyy ds J
For themal tesewołY T-constant
Sa-5T)JaQ
S2 SI
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Change in entropyy ds J For themal tesewołY T-constant Sa-5T)JaQ S2 SI

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Step 3
Change in entropy of hot tesonuoir
(-Ve sign be cause ,the hot body
is (oasing heat )
- 24K
Cds)hot
620
- 3-87 T [k
ds)hot
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Change in entropy of hot tesonuoir (-Ve sign be cause ,the hot body is (oasing heat ) - 24K Cds)hot 620 - 3-87 T [k ds)hot

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