Question

If a gas occupies 8.9 liters at a pressure of 745 mm Hg, what volume would it have at 725 mm Hg?

Answer 1

Approx. `9.1*L..........`

Explanation:

Charles' Law states that at constant temperature, and a given quantity of gas, the product `PxxV=k`. We don't even have to convert the pressure readings to atmospheres given the proportionality.

And thus, the volume of the gas should increase at reduced pressure, and indeed it does.

`P_1V_1=P_2V_2`

`V_2=(P_1V_1)/P_2=(8.9Lxx745*mm*Hg)/(725*mm*Hg)=??*L`