Question

Identify the INCORRECT statement for isobaric process.

• A. \(\Delta p=0\)
• B. \(W\neq 0\)
• C. \(Q\neq 0\)
• D. \(\Delta U=0\)

Hint:

An isobaric process happens at constant pressure. Check each statement against what happens to volume, temperature and internal energy.

Answer 1

The Correct Option is D

Step 1: Elimination
Constant pressure makes (A) true. The gas expands or contracts, so (B) is true. Heat must be exchanged to change the volume at constant pressure, so (C) is true.

Step 2: Remaining option
For an ideal gas $\Delta U=nC_{v}\Delta T$. In an isobaric process $\Delta T\neq0$, so $\Delta U\neq0$.

Step 3: Result
Option (D) is the incorrect statement.

Final Answer:
The false statement is delta U equal to zero. \[ \boxed{\text{(D) }\Delta U=0} \]