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11. thermodynamics — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics11. thermodynamics1 Mark
MCQ
A diatomic gas undergoes a process represented by $PV ^{1.3}=$ constant. Choose the incorrect statement
  • A
    The gas expands by absorbing heat from the surroundings
  • B
    The gas cools down during expansion
  • C
    The work done by surroundings during expansion of the gas is negative
  • ✓
    None of these
✓

Answer

Correct option: D.
None of these
d
(d)

$P V^{1.3}=K$

$W=\frac{P_2 V_2-P_1 V_1}{1-N}$

$\because N > 1$, so $W$ is negative.

Heat supplied by surrounding heat goes to do work.

$\therefore$ Down when expands.

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