A container has a volume of #5 L# and holds #1 mol# of gas. If the container is expanded such that its new volume is #9 L#, how many moles of gas must be injected into the container to maintain a constant temperature and pressure?

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Answer 1 · 2018-06-24T09:26:54

#0.8 mol#

According to Ideal gas equation,

#PV=nRT#

#rArr n/V=P/(RT)#

So for constant pressure and temperature,

#P/(RT)="constant"#

#(n_i)/(V_i)=(n_f)/(V_f)#

Put #n_i=1 , V_i=5L , V_f=9L " and " n_f=(n_i+x)#

You will get #x# as #0.8mol#