STANDARDChemistry-Thermodynamics
STANDARD Chemistry First Law of Thermodynamics MCQ Question
Type: MCQ-conceptual-Medium-Class 11
According to the first law of thermodynamics, ΔU = q + w. In special cases the statement can be expressed in different ways. Which of the following is not a correct expression?
A
At constant temperature q = −w
B
When no work is done: ΔU = q
C
In gaseous system: ΔU = q + PΔV
D
When work is done by the system: ΔU = q + w
Correct Answer
Option D
Detailed Explanation
When work is done by the system, the correct expression is ΔU = q - w.
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