Physics Thermodynamics First Law of Thermodynamics (Delta Q = Delta U + Delta W) MCQ (Single Correct)

Ideal gas is taken through process shown in figure:

A
In process AB, work done by system is positive
B
In process AB, heat is rejected out of the system.
C
In process AB, internal energy increases
D
In process AB internal energy decreases and in process BC internal energy increases.

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The correct answer is:
B

In process AB, T = constant, P = increases

P α

or V = decreases Δ Q = Δ W. Δ W = – ve.

or Δ Q = – ve

∴ heat is rejected out of the system

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