Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which of the following statements about thermodynamic processes is correct?
A
For isothermal expansion, the internal energy change is zero.
B
The enthalpy change for a reaction is always equal to the heat absorbed at constant pressure.
C
The entropy change of the surroundings increases during an exothermic reaction.
D
For any process, the heat change equals the work done if the system is isolated.
Correct Answer
Option A
Detailed Explanation
For isothermal processes, as stated in the NCERT context, the internal energy change (∆U) is indeed zero because the temperature remains constant, meaning that the heat supplied equals the work done. This aligns with the principles discussed in the context of isothermal expansion.
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