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Question

Assuming the same pressure in each case, calculate the mass of hydrogen required to inflate a balloon to a certain volume V at 100oC if 3.5 g helium is required to inflate the balloon to half the volume, 0.50V, at 25oC.

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Solution

n1R1T1V1=n2R2T2V2

n1×R×373V=3.5×R×2984×0.5V

n1=3.5×2982×373

n1=1.4

wt2=1.4

WeightofH2=2.8 gm

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