Q.

A 10 lit vessel contains He gas at 10 atm and TK. How many balloons of one litre capacity at 1 atm and 2TK can be filled by using the gas present in the cylinder.

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a

180

b

200

c

190

d

170

answer is C.

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Detailed Solution

Moles in balloons = 1×1R(2T)

Moles of gas in cylinder = 10×10R(T)

Moles of gas in cylinder = 10×1R(T)

Moles transfered = 100RT10RT=90RT

1 0.5RT;? 90RT

no.ofballoons=90/RT0.5/RT=180

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