Chemistry-First Law
NEET Chemistry First Law MCQ Question
Type: MCQ-numerical-Easy-Class 11
In a thermodynamic process, if the internal energy change (∆U) of a system is 50 J and the work done on the system (w) is -20 J, what is the heat transfer (q) involved in the process?
A
70 J
B
30 J
C
50 J
D
-70 J
Correct Answer
Option A
Detailed Explanation
According to the first law of thermodynamics, ∆U = q + w. Substituting the given values, 50 J = q - 20 J, which gives q = 70 J.
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