Which of the following groups comprise only state functions. Question 3Answera.Internal energy, enthalpy, and boundary work.b.internal energy, heat transfer, and entropy. c.heat transfer, boundary work, and entropy. d.heat transfer, enthalpy, and entropy.e.internal energy, enthalpy, and entropy.

The correct answer is e. Internal energy, enthalpy, and entropy.

Here's why:

State functions are properties that only depend on the state of the system, not on how that state was achieved.

a. Internal energy and enthalpy are state functions, but boundary work is not. Work depends on the path taken, not just the state of the system.

b. Internal energy and entropy are state functions, but heat transfer is not. Heat transfer, like work, depends on the path taken.

c. Entropy is a state function, but heat transfer and boundary work are not for the reasons mentioned above.

d. Enthalpy and entropy are state functions, but heat transfer is not.

e. Internal energy, enthalpy, and entropy are all state functions. They only depend on the state of the system, not how it got there.