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Question

Two flasks of equal volume connected by a narrow tube (of negligible volume) are at 27 C and contain 0.70 mole of H2 at 0.5 atm. One of the flasks is then immersed into a hot bath, kept at 127 C, while the other remains at 27 C. The final pressure is atm.

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Solution


Initially,

PV=nRT n=n1+n2=0.7

0.5(V+V)=0.7R×300;2V=0.7R×3000.5

P1=P2 n1R×300V=n2R×400V

n1=n2×43,n1+n2=0.7

n1=0.4,n2=0.3

P1=n1R×300V=0.4R×3000.7R×300=47 atm0.57 atm


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