The specific heat of 1 mole of an ideal gas at constant pressure, CP and at constant volume ,CV are given. Then-

1. CP of hydrogen gas is 52R

2. CV of hydrogen gas is 72R

3. H2 has very small values of CP and CV

4. CP-CV= 1.99 cal/mole-K for H2

Subtopic:  Specific Heat |
 66%
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One mole of ideal monoatomic gas γ=5/3 is mixed with one mole of diatomic gas γ=7/5. What is γ for the mixture? γ denotes the ratio of specific heat at constant pressure, to that at constant volume

1.  3/2                             

2.  23/15

3.  35/23                         

4.  4/3

Subtopic:  Specific Heat |
 62%
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A gaseous mixture contains equal number of hydrogen and nitrogen molecules. Specific heat measurements on this mixture at temperatures below 100 K would indicate that the value of γ (ratio of specific heats) for this mixture is

1.  3/2                           

2.  4/3

3.  5/3                           

4.  7/5

Subtopic:  Specific Heat |
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One mole of monoatomic gas and three moles of diatomic gas are put together in a container. The molar specific heat in J K-1 mol-1 at constant volume is R=8.3 J K-1 mol-1

1.  18.7                           

2.  18.9

3.  19.2                           

4.  None of the above

Subtopic:  Specific Heat |
 57%
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The number of translational degrees of freedom for a diatomic gas is

1.  2                           

2.  3

3.  5                           

4.  6

Subtopic:  Law of Equipartition of Energy |
 71%
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A gaseous mixture consists of 16g of helium and 16g of oxygen. The ratio CPCV of the mixture is

1.  1.4                       

2.  1.54

3.  1.59                     

4.  1.62

Subtopic:  Specific Heat |
 60%
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The pressure exerted by the gas on the walls of the container because

1. It loses kinetic energy

2. It sticks with the walls

3. On collision with the walls there is a change in momentum

4. It is accelerated towards the walls

Subtopic:  Kinetic Energy of an Ideal Gas |
 91%
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Gas at a pressure P0 is contained in a vessel. If the masses of all the molecules are halved and their speeds are doubled, the resulting pressure P will be equal to

1.  4P0                                 

2.  2P0

3.  P0                                   

4.  P02

Subtopic:  Types of Velocities |
 68%
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Consider a gas with density ρ and c¯ as the root mean square velocity of its molecules contained in a volume. If the system moves as whole with velocity v, then the pressure exerted by the gas is

1.  13ρc¯ 2                                   

2.  13ρc+v2

3.  13ρc¯-v2                         

4.  13ρc-2-v2

Subtopic:  Types of Velocities |
 66%
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In kinetic theory of gases, a molecule of mass m of an ideal gas collides with a wall of vessel with velocity V. The change in the linear momentum of the molecule is

1.  2mV                           

2.  mV

3.  – mV                           

4.  Zero

Subtopic:  Kinetic Energy of an Ideal Gas |
 81%
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