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Heat of amount 250 J is removed from a heat reservoir at a temperature of 270 K. What is the entropy change of the reservoir? Hint AS: J/K. (Use the sign to indicate whether entropy of reservoir increases or decreases.)

Heat of amount 250 J is removed from a heat reservoir at a temperature of 270 K. What is the entropy change of the reservoir? Hint AS: J/K. (Use the sign to indicate whether entropy of reservoir increases or decreases.)

University Physics Volume 2
University Physics Volume 2
18th Edition
ISBN:9781938168161
Author:OpenStax
Publisher:OpenStax
Chapter4: The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 57P: Two hundred grams of water at 0 is brought into contact with a heat reservoir at 80 . After thermal...
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Heat of amount 250 J is removed from a heat reservoir at a temperature of 270 K. What is the entropy change of the reservoir?

Hint

 

ΔS=ΔS= J/KJ/K. (Use the sign to indicate whether entropy of reservoir increases or decreases.)

Submit QuestionQuestion 9

It is found that an engine discharges 50 J while absorbing 85 J each cycle of operation.

Hint

 

  1. What is the efficiency of the engine? eff=eff=
  2. How much work does it perform per cycle? W=W= J
Heat of amount 250 J is removed from a heat reservoir at a temperature of 270 K. What is the entropy change of the reservoir? Hint J/K. (Use the sign to indicate whether entropy of reservoir increases or decreases.)
Transcribed Image Text:Heat of amount 250 J is removed from a heat reservoir at a temperature of 270 K. What is the entropy change of the reservoir? Hint J/K. (Use the sign to indicate whether entropy of reservoir increases or decreases.)
It is found that an engine discharges 50 J while absorbing 85 J each cycle of operation. Hint a. What is the efficiency of the engine? eff= b. How much work does it perform per cycle? W J
Transcribed Image Text:It is found that an engine discharges 50 J while absorbing 85 J each cycle of operation. Hint a. What is the efficiency of the engine? eff= b. How much work does it perform per cycle? W J
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