# If formals of gas are added to a container that already hold one mole of gas, how will the pressure change with in the container?

Aug 23, 2017

The ratio of the pressures will equal the ratio of the molar change.

#### Explanation:

Assuming "Four Moles" was meant, the total new amount is 5 moles. From the Ideal Gas Law, at constant temperature:

$\frac{5}{1} = {P}_{2} / {P}_{1}$

So the new pressure will be five times the original pressure.

${P}_{2} = 5 \times {P}_{1}$