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Q.

What per cent of a sample of nitrogen must be allowed to escape if its temperature, pressure and volume are to be changed as given?

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a

75.00%

b

16.67%

c

25.00%

d

83.33%

answer is B.

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Detailed Solution

p1V1T1=3×1.65546=9.066×103 p2V2T2=0.75×0.55273=1.51×103<p1V1T1  Hence, N2 gas in LHS should escape to make p1v1T1=p2v2T2  V1=p2V2×T1T2×P1=0.75×0.55×546273×3=0.275L  Volume of N2 escaped =1.650.275=1.375L  Hence, fraction of N2 escaped =1.3751.65=0.8333

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What per cent of a sample of nitrogen must be allowed to escape if its temperature, pressure and volume are to be changed as given?