Thermodynamics Question 256
Question: During an adiabatic process an object does 100 J of work and its temperature decreases by 5K. During another process it does 25J of work and its temperature decreases by 5K. Its heat capacity for 2nd process is
Options:
A) 20 J/K
B) 24 J/K
C) 15 J/K
D) 100 J/K
Show Answer
Answer:
Correct Answer: C
Solution:
[c] For adiabatic process, $ dU=-100J $ Which remains same for other processes also.
Let C be the heat capacity of 2nd process then $ -(C)5=dU+dW=-100+25=-75 $
$ \therefore C=15J/K $
