Gas Volumes and the Ideal Gas Law 11.3

Volumes of Reacting Gases Gay-Lussac’s law of combining volumes of gases – at constant T and P, the V of gaseous reactants and products can be expressed as ratio’s of small whole numbers Avogadro’s Law – V of gases at the same T and P contain = # of molecules

Volumes of Reacting Gases Standard Molar Volume of a Gas – the V occupied by 1 mole of a gas at STP is L or 22.41L Ideal Gas Law – mathematical relationship among P,V, T, and the number of molecules of a gas

Ideal Gas Law PV=nRT R is Ideal Gas constant Value depends on the units used Latm8.314 LkPa molK

The Ideal Gas Law What is the P in atmospheres exerted by a mol sample of Nitrogen gas in a 10.0 L container at 298 K? What P in atmospheres, is exerted by mol of H gas in a 4.08 L container at 35°C.

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