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.

• A. Both (A) and (B) are correct.
• B. (A) is correct but (B) is wrong.
• C. (A) is wrong but (B) is correct.
• D. Both (A) and (B) are wrong.

Answer 1

The correct option is C (A) is wrong but (B) is correct.

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.