The average kinetic energy of a gas molecule at 27°C is 6.21×10-21 J. Its average kinetic energy at 227°C will be

1. 52.2×10-21 J                           

2. 5.22×10-21 J

3. 10.35×10-21 J                         

4. 11.35×10-21 J

Subtopic:  Kinetic Energy of an Ideal Gas |
 81%
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The average translational energy and the r.m.s. speed of molecules in a sample of oxygen gas at 300 K are 6.21×10-21 J and 484 m/s respectively. The corresponding values at 600 K are nearly (assuming ideal gas behaviour)

1.  12.42×1021 J, 968 m/s                     

2.  8.78×1021 J, 684 m/s

3.  6.21×1021 J, 968 m/s                       

4.  12.42×10-21 J, 684 m/s

 

Subtopic:  Kinetic Energy of an Ideal Gas |
 76%
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At 0 K which of the following properties of a gas will be zero

1. Kinetic energy                     

2. Potential energy

3. Vibrational energy               

4. Density

Subtopic:  Kinetic Energy of an Ideal Gas |
 77%
From NCERT
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A gas mixture consists of molecules of type 1, 2 and 3, with molar masses m1>m2>m3. Vrms and K¯ are the r.m.s. speed and average kinetic energy of the gases. Which of the following is true

1. Vrms1<Vrms2<Vrms3 and K¯1=K¯2=K¯3

2. Vrms1=Vrms2=Vrms3 and K¯1=K¯2>K¯3

3. Vrms1>Vrms2>Vrms3 and K¯1<K¯2>K¯3

4. Vrms1>Vrms2>Vrms3 and K¯1<K¯2<K¯3

Subtopic:  Types of Velocities |
 86%
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Two ideal gases at absolute temperature T1 and T2 are mixed. There is no loss of energy. The masses of the molecules are m1 and m2 and the number of molecules in the gases are n1 and n2 respectively. The temperature of mixture will be

1. T1+T22 energy                     

2. T1+T2n1n2

3. n1T1+n2T2n1+n2                         

4. T1+T2

Subtopic:  Law of Equipartition of Energy |
 89%
From NCERT
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The molecules of an ideal gas at a certain temperature have

1. Only potential energy

2. Only kinetic energy

3. Potential and kinetic energy both

4. None of the above

Subtopic:  Kinetic Energy of an Ideal Gas |
 63%
From NCERT
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The temperature at which the average translational kinetic energy of a molecule is equal to the energy gained by an electron in accelerating from rest through a potential difference of 1 volt is

1.  4.6×103 K                 

2.  11.6×103 K

3.  23.2×103 K               

4.  7.7×103 K

Subtopic:  Kinetic Energy of an Ideal Gas |
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The kinetic energy of one mole gas at 300 K temperature, is E. At 400 K temperature kinetic energy is E'. The value of E'/E is

1.  1.33                         

2.  43

3.  169                           

4.  2

Subtopic:  Kinetic Energy of an Ideal Gas |
 82%
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N molecules each of mass m of gas A and 2N molecules each of mass 2m of gas B are contained in the same vessel at temperature T. The mean square of the velocity of molecules of gas B is v2 and the mean square of x component of the velocity of molecules of gas A is w2. The ratio is w2v2is

1.  1                                 

2.  2

3.  13                               

4.  23

Subtopic:  Types of Velocities |
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A gas is filled in a cylinder, its temperature is increased by 20% on Kelvin scale and volume is reduced by 10%. How much percentage of the gas will leak out: (Assume pressure is constant)

1. 30%                           

2. 40%

3. 15%                           

4. 25%

Subtopic:  Ideal Gas Equation |
 55%
From NCERT
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