A) Internal energy will decrease
B) Internal energy: will increase
C) Internal energy will become zero
D) Internal energy will remain same
Correct Answer: D
Solution :
For a process to be isothermal, any heat flow into or out of the system must occur slowly enough, so that thermal equilibrium is maintained. Hence, in a isothermal process, temperature during the whole process does not change i.e., internal energy which is a function of temperature remains same throughout the process.
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