Molar Specific Heat Thermodynamics Thermodynamics Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

A monoatomic gas performs a work of

\frac{Q}{4}

$\dfrac{ Q} {4}$ where

Q

$Q$ is the heat supplied to it. During this transformation, the molar heat capacity of the gas will be: (

R

$R$ is the gas constant.)

1.	$R$	2.	$2R$
3.	$3R$	4.	$4R$

Subtopic: Molar Specific Heat |

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Q2:

The

(P - V)

$(P\text-V)$ graph of an ideal monoatomic gas is as shown. The molar heat capacity of gas will be:

1. $2R$
2. $3R$
3. $5R$
4. $7R$

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Q3:

One mole of a monoatomic ideal gas is mixed with one mole of a diatomic ideal gas. The molar specific heat of the mixture at constant volume is:
1.

8 R

$8R$
2.

\frac{3 R}{2}

$\dfrac{3R}{2}$
3.

2 R

$2R$
4.

2.5 R

$2.5R$

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Q4:

A gas undergoes an isothermal process. The specific heat capacity of the gas in the process is:

1.	infinity	2.	$0.5$
3.	zero	4.	$1$

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Q5:

A thermally insulated vessel contains an ideal gas of molecular mass

M

$M$ and a specific heat ratio of

1.4.

$1.4.$ The vessel is moving with speed

v

$v$ and is suddenly brought to rest. Assuming no heat is lost to the surroundings, then the vessel temperature of the gas increases by:
(

R =

$R=$ universal gas constant)
1.

\frac{M v^{2}}{7 R}

$\dfrac{M v^2}{7 R}$
2.

\frac{M v^{2}}{5 R}

$\dfrac{M v^2}{5 R}$
3.

\frac{2 M v^{2}}{7 R}

$\dfrac{2M v^2}{7 R}$
4.

\frac{7 M v^{2}}{5 R}

$\dfrac{7M v^2}{5 R}$

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Q6:

A diatomic gas (

γ = 1.4

$\gamma= 1.4$ ) does

400

$400$ J of work when it is expanded isobarically. The heat given to the gas in the process is:
1.

1000

$1000$ J
2.

1200

$1200$ J
3.

1400

$1400$ J
4.

1600

$1600$ J

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Q7:

At a certain temperature, the degree of freedom per molecule for gas is

8

$8$ . The gas performs

150

$150$ J of work when it expands under constant pressure. The amount of heat absorbed by the gas will be:
1.

530 J

$530~\text{J}$
2.

380 J

$380~\text{J}$
3.

100 J

$100~\text{J}$
4.

750 J

$750~\text{J}$

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Q8:

The molar specific heat at a constant pressure of an ideal gas is $\dfrac{7}{2}R.$ The ratio of specific heat at constant pressure to that at constant volume is:

1.	$\dfrac{7}{5}$	2.	$\dfrac{8}{7}$
3.	$\dfrac{5}{7}$	4.	$\dfrac{9}{7}$

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Q9:

600 J

$600~\text{J}$ of heat is added to a monoatomic gas in a process in which the gas performs a work of

150 J

$150~\text{J}$ . The molar heat capacity for the process is:
1.

3 R

$3R$
2.

4 R

$4R$
3.

2 R

$2R$
4.

6 R

$6R$

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