Question

Among the following statements, the correct statement is

• A. Internal energy of a gas depends only on the state of the gas.
• B. In an isothermal process change in internal energy is maximum.
• C. Area under pressure-volume graph equals heat supplied in any process.
• D. Work done is state dependent but not path dependent.

Answer 1

Answer: (A)

Internal energy of a gas is state dependent and path independent.
In an isothermal process, temperature remains constant, therefore change in internal energy is zero. Area under pressure-volume graph is equal to the work done by the gas. Work done is both state and path dependent.