One mole of an ideal gas at an initial temperature of T K does 6R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 5/3, the final temperature of the gas will be:

1. (T + 2.4)K

2. (T – 2.4)K

3. (T + 4)K

4. (T – 4)K

Subtopic:  Work Done by a Gas |
 55%
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The volume of a gas is reduced adiabatically to 14 of its volume at 27°C, if the value of γ = 1.4, then the new temperature will be - 

(1) 350 × 40.4 K

(2) 300 × 40.4 K

(3) 150 × 40.4 K

(4) None of these

Subtopic:  Types of Processes |
 89%
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For an adiabatic expansion of a perfect gas, the value of ΔPP is equal to 

(1) γΔVV

(2) ΔVV

(3) γΔVV

(4) γ2ΔVV

Subtopic:  Types of Processes |
 82%
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A gas expands under constant pressure P from volume V1 toV2. The work done by the gas is 

(1) P(V2V1)

(2) P(V1V2)

(3) P(V1γV2γ)

(4) PV1V2V2V1

Subtopic:  Work Done by a Gas |
 88%
From NCERT
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When heat is given to a gas in an isobaric process, then 

(1) The work is done by the gas

(2) Internal energy of the gas increases

(3) Both (1) and (2)

(4) None from (1) and (2)

Subtopic:  Types of Processes |
 78%
From NCERT
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A gas expands 0.25m3 at constant pressure 103 N/m2, the work done is -

(1) 2.5 ergs

(2) 250 J

(3) 250 W

(4) 250 N

Subtopic:  Work Done by a Gas |
 88%
From NCERT
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Which of the following is correct in terms of increasing work done for the same change in volume?

(1) Adiabatic < Isothermal < Isobaric

(2) Isobaric < Adiabatic < Isothermal

(3) Adiabatic < Isobaric < Isothermal

(4) None of these

Subtopic:  Work Done by a Gas |
 64%
From NCERT
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A sample of gas expands from volume V1 to V2. The amount of work done by the gas is greatest when the expansion is 

(1) Isothermal

(2) Isobaric

(3) Adiabatic

(4) Equal in all cases

Subtopic:  Work Done by a Gas |
 72%
From NCERT
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A Container having 1 mole of a gas at a temperature 27°C has a movable piston which maintains constant pressure in a container of 1 atm. The gas is compressed until the temperature becomes 127°C. The work done is:

(1) 703 J

(2) 831 J

(3) 121 J

(4) 2035 J

Subtopic:  Work Done by a Gas |
 70%
From NCERT
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Entropy of a thermodynamic system does not change when this system is used for -

(1) Conduction of heat from a hot reservoir to a cold reservoir

(2) Conversion of heat into work isobarically

(3) Conversion of heat into internal energy isochorically

(4) Conversion of work into heat isochorically

Subtopic:  Types of Processes |
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