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
• B. a,b
• C. a,b,c
• D. None of these

Answer 1

The correct option is B a,b

In adiabatic reversible expansion of an Ideal gas:-

$△E_{system}$=Decreases.

$\because △E=q+W$

$q=0$ In adiabatic process and

$W=$ Negative, because work is done by the system in expansion .

Also, temperature of the system decreases.