AIPMT PRELIMS2011Physics-Thermodynamics
AIPMT PRELIMS 2011 Physics Isothermal Processes MCQ Question
Type: MCQ-conceptual-Medium-Class 11
During an isothermal expansion, a confined ideal gas does –150 J of work against its surrounding. This implies that
A
150 J of heat has been added to the gas
B
150 J of heat has been removed from the gas
C
300 J of heat has been added to the gas
D
No heat is transferred because the process is isothermal
Correct Answer
Option B
Detailed Explanation
In an isothermal process, ΔU = 0, so ΔQ = -ΔW. Since ΔW = -150 J, ΔQ = 150 J, indicating heat has been removed.
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