Question

Among the following, the state functions is/are :

• A. Internal energy
• B. Irreversible expansion work
• C. Reversible expansion work
• D. Molar enthalpy

Answer 1

Answer: (A), (D)

The correct options are
A Internal energy
D Molar enthalpy

$\Delta U,\Delta H$ are state function, means their value doesn't depend on the path taken to reach a specific state of the system. It only depends on final and initial state of the system.
Work and heat are path function because it values depend the path they are proceeding. They have different values for different path to reach a same state of system.
State functions are exact defferential and path functions are inexact differentials.