Question

Which of the following is NOT the state function?

• A. Gibbs energy
• B. Temperature
• C. Heat
• D. Heat transfer at constant volume (\(Q_{v}\))

Hint:

A state function depends only on the initial and final states. Heat and work depend on the path.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
A state function depends only on the state of the system, not on the path followed.

Step 2: State Functions
Gibbs energy and temperature are state functions. Heat at constant volume equals \(\Delta U\), and \(U\) is a state function, so \(Q_v\) behaves like one too.

Step 3: Path Function
Heat \(q\) in general depends on the path taken, so it is not a state function.

Final Answer:
Heat is not a state function. \[ \boxed{\text{(C) }\text{Heat}} \]