NEET UG PHYSICS MCQ: THERMODYNAMICS

1 Medium

1 of 1

Analyzing +4 | -1

Consider an ideal gas confined in an isolated closed chamber. As the gas undergoes an adiabatic expansion, the average time of collision between molecules increases as

{V^q},

where V is the volume of the gas. The value of q is

\left( {\gamma = \frac{{{C_P}}}{{{C_V}}}} \right)

View answer and explanation

Correct option: C

\frac{{\gamma + 1}}{2}

Option C (

\frac{{\gamma + 1}}{2}

) is correct because the average time of collision increases with volume as

V^{(\gamma+1)/2}

in an adiabatic expansion.

More Questions from THERMODYNAMICS

Practice All Chapter MCQs →

The work done during expansion of a gas is independent of pressure if the expansion takes place When heat is added to a system, which of the following is not possible? The

p-T

relation for an adiabatic expansion is
A Carnot engine has efficiency

\frac{1}{4}

. Efficiency becomes

\frac{1}{3}

when temperature of sink is decreased by 50 K (keeping source fixed). What is the original temperature of the sink? If sink and source temperature of a refrigerator are

4^{\circ} \mathrm{C}

and

15^{\circ} \mathrm{C}

respectively. Then efficiency of refrigerator is The

SI

unit of mechanical equivalent of heat is