A container has a volume of #4 L# and holds #3 mol# of gas. If the container is expanded such that its new volume is #8 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 · 2017-03-08T07:02:10

The number of moles is #=3mol#

The Ideal Gas Law is

#PV=nRT#

#V/n=RT/P#

#V/n=k#

Where #k=#constant

#V_1/n_1=V_2/n_2#

#V_1=4L#

#n_1=3mol#

#V_2=8L#

#n_2=V_2/V_1*n_1#

#=8/4*3=6mol#

We must inject #6-3=3mol#