A container has a volume of #9 L# and holds #18 mol# of gas. If the container is expanded such that its new volume is #54 L#, how many moles of gas must be injected into the container to maintain a constant temperature and pressure?
The answer is
Let's work with the ideal gas equation
With the initial conditions,
With the final conditions,
as the temperature and the pressure do not change,
From those 2 equations,
Number of moles of gas to be injected