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Question

During an adiabatic reversible expansion of an ideal gas
a. internal energy of the system decreases.
b. temperature of the system decreases.
c. pressure increases.

A
a
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B
a,b
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C
a,b,c
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D
None of these
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Solution

The correct option is B a,b
In adiabatic reversible expansion of an Ideal gas:-
Esystem=Decreases.
E=q+W
q=0 In adiabatic process and
W= Negative, because work is done by the system in expansion .
Also, temperature of the system decreases.

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