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Question
Consider the following two statements.
(A) If heat is added to a system, its temperature must increase.
(B) If positive work is done by a system in a thermodynamic process, its volume must increase.
Options
Both A and B are correct
A is correct but B is wrong
B is correct but A is wrong
Both A and B are wrong
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Solution
B is correct but A is wrong
If heat is added to a system in an isothermal process, then there'll be no change in the temperature.
Work done by system, ΔW = P Δ V
⇒ ΔW = Positive ⇒ ΔV = Positive
Here,
P = Pressure
ΔV = change in volume
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