A container has a volume of #5 L# and holds #2 mol# of gas. If the container is expanded such that its new volume is #12 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 · 2017-05-18T04:49:46

The number of moles is #=2.8mol#

We apply Avogadro's Law (Temperature and Pressure constant)

#V_1/n_1=V_2/n_2#

The initial volume is #=5L#

The initial number of moles is #=2mol#

The final volume is #=12L#

The final number of moles is

#n_2=V_2/V_1*n_1#

#=12/5*2=4.8mol#

The number of moles to be injected is

#=4.8-2=2.8mol#