Combined Gas Law

Avogadro’s Principle

2-Variable Gas Laws

Boyle’s Law:P1V1 = P2V2

Charles’s Law: 𝑉 1

𝑇 1=𝑉 2𝑇 2

Gay-Lussac’s Law: 𝑃1

𝑇 1=𝑃 2𝑇 2

Combined Gas Law

Combine the relationships of the 3 gas laws to relate

Pressure, Temperature, and Volume for a fixed amount

of gas =

Combined Gas Law ExampleA gas at 110 kPa and 30.0°C fills a

flexible container with an initial volume of 2.0 L. If the temperature is raised to 80.0°C and the pressure increased to 440 kPa, what is the new volume?

Avogadro’s Principle

Equal volumes of gases at the same temperature and pressure contain equal numbers of particles. =

1 mole of any gas occupies a volume of 22.4 L at STP.

Avogadro’s Principle Example

Calculate the volume that 0.881 moles of any gas at STP will occupy.