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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.
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