# A container has a volume of #3 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?

##### 1 Answer

Aug 18, 2016

P times V equals n times R times T

#### Explanation:

Since P (pressure) and T (temperature in Kelvin) will be the same:

and R is constant

In the second situation, you expand (volume) 4 times (

Now you need to inject