A gas is compressed adiabatically, which one of the following sta… - Vidyadip

MCQ

A gas is compressed adiabatically, which one of the following statement is NOT true.

A
There is no heat supplied to the system
B
The temperature of the gas increases
C
The change in the internal energy is equal to the work done on the gas.
✓
There is no change in the internal energy

✓

Answer

Correct option: D.

There is no change in the internal energy

d
(1) $\Delta Q=0$

(2) $\Delta Q =\Delta U +\Delta W$

$\Rightarrow \Delta U =-\Delta W$

adiabatic compression $( V \downarrow)$

$\Delta W =- ve \Rightarrow \Delta U =+ ve$

$\Delta U \uparrow \Rightarrow T \uparrow$

$\Delta U \neq 0$

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