How to Calculate the Volume of a Cylinder Using Ideal Gas Equation?

[marcio]

Homework Statement

An ideal gas is stored in a cylinder whose volume is unknown. Part of this gas is transferred to another cylinder whose volume is 300 cm³ and pressure is 790 mmHg. The mass loss caused the pressure in the first cylinder to decrease from 650 to 630 mmHg. Considering that all measurements were taken at constant temperature, calculate the volume of the cylinder.

Homework Equations

PV=nRT
PV=k

I just can't get it started.

Thank you in advance!

 

[Chestermiller]

Let n₀ represent the number of moles of gas originally in the cylinder, and let n₀-Δn be the number of moles remaining after part of the mass was transferred to the other cylinder. How many moles were transferred to the other cylinder. Let V equal to the volume of the cylinder of interest. Write the ideal gas equation for the conditions in the cylinder of interest both before the transfer of mass and after the transfer of mass. Also write the ideal gas equation for the conditions in the cylinder to which the mass was transferred.

Chet

 

[marcio]

Let n₀ represent the number of moles of gas originally in the cylinder, and let n₀-Δn be the number of moles remaining after part of the mass was transferred to the other cylinder. How many moles were transferred to the other cylinder. Let V equal to the volume of the cylinder of interest. Write the ideal gas equation for the conditions in the cylinder of interest both before the transfer of mass and after the transfer of mass. Also write the ideal gas equation for the conditions in the cylinder to which the mass was transferred.

Chet

The start I needed exactly. It seems simple after you get the 'hint'.

Thank you very much.