Physics - Heat & Thermo Question with Solution | TestHub
Statement - 1: For a real gas, .
Statement - 2: In an isobaric process, part of the heat is spent doing work during expansion against external pressure.
Options:
Answer:
Solution:
Statement - 1: For an ideal gas, . For a real gas, some energy is used to overcome intermolecular forces during expansion, so . Thus, Statement - 1 is True.
Statement - 2: In an isobaric process, the pressure is constant. When heat is supplied, the gas expands and performs work against the constant external pressure. Thus, Statement - 2 is True.
However, Statement - 2 does not explain why for a real gas. The difference for a real gas is greater than R due to work done against intermolecular forces, not just external pressure.
Therefore, Statement - 1 is True, Statement - 2 is True, but Statement - 2 is NOT a correct explanation for Statement - 1.
The final answer is