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Q.

The weight of one litre of a gas at 1atm pressure and 300K is 4g. At what temperature the weight of the gas is 4g when the pressure is made 0.5 atm and volume is 1 litre?

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a

200K

b

150K

c

600K

d

1200K

answer is B.

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Detailed Solution

Given

W1=4g               W2=4g

V1=IL                    V2=IL

P1=1 atm           P2=0.5atm

T1=300k         T2=?

P1V1P2V2=W1T1W2T2

if W1=W2

P1P2=T1T2

10.5=300T2

T2=300×0.5

T2=150K

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