Chapter 11 Ideal Gas Law and Gas Stoichiometry

11.1- Mass and Volume of GasesAvogadros Principle = Equal volume of gases at same T and P have same numbers of molecules All of these balloons are the same size (same volume)All of these balloons are at the same Temperature and Pressure insideAll of these balloons would have the same number of MOLECULESThese balloons would have DIFFERENT masses!(Stop at 6:14)World of Chemistry The Mole

1 mol of anything = 6.02 x 1023 particles11.1- Mass and Volume of Gases1 mol of any gas = same number particles = 6.02 x 1023 particles = same volume = different massMolar Volume = Volume of 1 mole of any gas at STP 22.4 L = 1 mole of gas at STP

Examples: 11.1- Mass and Volume of Gases

Gas Density-Depends on T and P-We will start by looking at density at STPdSTP = Molar Mass Molar VolumeExamples: 11.1- Mass and Volume of Gases

Molar Mass

MM = dSTP * Molar Volume (will be given) 11.1- Mass and Volume of Gases

11.2 - Ideal Gas Law Used on ONE gas at ONE set of conditions (will be given to Academic) PV = nRT

PressureVolumemolesIdeal Gas ConstantTemperatureR = 0.08206 L atm /mol K= 62.4 L mmHg / mol K= 8.314 L KPa / mol K

How do you know which R to pick???11.2 - Ideal Gas Law R = 0.08206 L atm /mol K= 62.4 L mmHg / mol K= 8.314 L KPa / mol KBy the PRESSURE UNIT!!If Pressure is in mmHgPick 62.4 L mmHg / mol KIf Pressure is in KPaPick 8.314 L KPa / mol K

Examples:11.2 - Ideal Gas Law

Examples:11.2 - Ideal Gas Law

Examples:11.2 - Ideal Gas Law

Non-STP Gas Densityd = MM * P(will be given)R * TExamples:

Non-STP Molar MassMM = mass sample * R * T P * VWill be givenExamples:

11.3- Stoichiometry of Gases-NEED BALANCED EQUATION!!-Could include info from Chapter 3, 7,8,9, 10, or 11!!

Review:11.3- Stoichiometry of GasesNew Information:With GASESThere are other options:Moles to Volume using 22.4L/mole at STP or PV=nRTVolume to Moles using 22.4L/mole at STP or PV=nRT

11.3- Stoichiometry of GasesVolume A if a GASVolume B if a GAS22.4 L/mol IF at STPORPV=nRT if NOT STP22.4 L/mol IF at STPORPV=nRT if NOT STP

Examples:11.3- Stoichiometry of Gases

Examples:11.3- Stoichiometry of Gases

Examples:11.3- Stoichiometry of Gases

Examples:11.3- Stoichiometry of Gases