Helium at 27°C has a volume of 8 litres. It is suddenly compressed to a volume of 1 litre. The temperature of the gas will be [γ = 5/3] 

(1) 108°C

(2) 9327°C

(3) 1200°C

(4) 927°C

Concept Questions :-

Types of processes
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A cycle tyre bursts suddenly. This represents an 

(1) Isothermal process

(2) Isobaric process

(3) Isochoric process

(4) Adiabatic process

Concept Questions :-

Types of processes
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One mole of helium is adiabatically expanded from its initial state (Pi,Vi,Ti) to its final state (Pf,Vf,Tf). The decrease in the internal energy associated with this expansion is equal to

(1) CV(TiTf)

(2) CP(TiTf)

(3) 12(CP+CV)(TiTf)

(4) (CPCV)(TiTf)

Concept Questions :-

Types of processes
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A diatomic gas initially at 18°C is compressed adiabatically to one-eighth of its original volume. The temperature after compression will be 

(1) 10°C

(2) 887°C

(3) 668 K

(4) 144°C

Concept Questions :-

Types of processes
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During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio Cp/Cv for the gas is 

(1) 32

(2) 43

(3) 2

(4) 53

Concept Questions :-

Types of processes
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One mole of an ideal gas at an initial temperature of T K does 6 R 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 gas will be -

(1) (T + 2.4)K

(2) (T – 2.4)K

(3) (T + 4)K

(4) (T – 4)K

Concept Questions :-

Types of processes
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We consider a thermodynamic system. If ΔU represents the increase in its internal energy and W the work done by the system, which of the following statements is true ?

1. ΔU = –W in an adiabatic process

2. ΔU = W in an isothermal process

3. ΔU = –W in an isothermal process

4. ΔU = W in an adiabatic process

Concept Questions :-

Types of processes
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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

Concept Questions :-

Types of processes
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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

Concept Questions :-

Types of processes
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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

Concept Questions :-

Work done by gas
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