Chemistry · THERMODYNAMICS

Consider the following statements regarding thermodynamic systems and functions: (A) Volume, temperature, and internal energy are state functions because their values depend only on the state of the system and not on how it is reached. (B) Heat (\( q \)) and work (\( w \)) are path functions, but their sum \( (q + w) \) is a state function. (C) In an isolated system, no exchange of matter is possible, but energy can be exchanged via electromagnetic radiation. (D) For an adiabatic process, the wall separating the system from the surroundings does not permit transfer of heat, so \( \Delta U = w_{\text{ad}} \). Which of the above statements are correct?

1. A
   (A), (B) and (D) only
2. B
   (B), (C) and (D) only
3. C
   (A) and (D) only
4. D
   (A), (B) and (C) only