EASY

JEE Main

IMPORTANT

Earn 100

For a gas $γ = \frac{5}{3}$ and $640 cc$ of this gas is suddenly compressed to $80 cc$ . If the initial pressure is $p$ , then the final pressure will be

50% studentsanswered this correctly

Important Questions on The First Law of Thermodynamics

EASY

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 15 - The First Law of Thermodynamics>Objective Problems>Q 36

When an ideal gas is compressed isothermally, then its pressure increases because

EASY

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 15 - The First Law of Thermodynamics>Objective Problems>Q 37

In an isothermal expansion of an ideal gas, select wrong statement.

EASY

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 15 - The First Law of Thermodynamics>Objective Problems>Q 38

When an enclosed perfect gas is subjected to an adiabatic process, then

EASY

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 15 - The First Law of Thermodynamics>Objective Problems>Q 39

One mole of an ideal monoatomic gas is at

360 K

and with pressure of

10^{5} Pa

. It is compressed at constant pressure until its volume is halved. Taking

R

8.3 J {mol}^{- 1} K^{- 1}

and the initial volume of the gas as

3.0 \times 10^{- 2} m^{3}

, the work done is

EASY

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 15 - The First Law of Thermodynamics>Objective Problems>Q 40

A certain mass of an ideal gas is at pressure

p_{1}

and volume

V_{1}

. It is compressed isothermally and then allowed to expand adiabatically until its pressure returns to

p_{1}

. The gas is then allowed to expand to its original volume. Upon which of the following

p - V

graphs are these processes correctly shown?

EASY

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 15 - The First Law of Thermodynamics>Objective Problems>Q 41

A monoatomic ideal gas, initially at temperature

T_{1}

, is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature

T_{2}

by releasing the piston suddenly. If

L_{1}

and

L_{2}

are lengths of the gas column before and after expansion respectively, then

\frac{T_{1}}{T_{2}}

is given by

EASY

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 15 - The First Law of Thermodynamics>Objective Problems>Q 42

Starting with the same initial conditions, an ideal gas expands from volume

V_{1}

V_{2}

in three different ways. The work done by the gas is

W_{1}

if the process is isothermal,

W_{2}

if isobaric and

W_{3}

if adiabatic, then

EASY

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 15 - The First Law of Thermodynamics>Objective Problems>Q 43

$A$ and $B$ are two adiabatic curves for two different gases. Then $A$ and $B$ corresponds to

Question Image

For a gas γ=53 and 640cc of this gas is suddenly compressed to 80cc. If the initial pressure is p, then the final pressure will be

Important Questions on The First Law of Thermodynamics

Learn and Prepare for any exam you want !

For a gas $γ = \frac{5}{3}$ and $640 cc$ of this gas is suddenly compressed to $80 cc$ . If the initial pressure is $p$ , then the final pressure will be