# If #3 L# of a gas at room temperature exerts a pressure of #7 kPa# on its container, what pressure will the gas exert if it the container's volume changes to #2/3 L#?

##### 1 Answer

#### Explanation:

This question is asking us to use things we know about gasses to find the final condition after a change of one of the variables. The ideal gas law can help us:

Where

Since we have two conditions, call them 1 and 2, we can use this expression to solve for them, i.e. in our initial conditions we have

and in our final state we have

the trick is to understand that the constant is the same in both cases (none of

We can solve this for