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Question

Consider the following two statements and choose the correct answer :
A) If heat is added to a system its temperature must always increase
B) If positive work is done by a system in thermodynamic process its volume must increase.
  1. Both (A) and (B) are correct.
  2. (A) is correct but (B) is wrong.
  3. (A) is wrong but (B) is correct.
  4. Both (A) and (B) are wrong.

A
(A) is correct but (B) is wrong.
B
Both (A) and (B) are wrong.
C
Both (A) and (B) are correct.
D
(A) is wrong but (B) is correct.
Solution
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If heat is added to a system, the system can do work without changing its internal energy (isothermal process). Hence, statement 1 is false.

Positive work means gas is expanding. Hence, it's volume must increase.

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