Chemistry - Gas Laws - Ideal gas law (PV=nRT) - PV=nRT Worked Examples
4 worked examples. Show R values: R = 0.0821 L·atm/(mol·K) or R = 8.314 J/(mol·K). Example 1: 'Find V of 2 mol gas at 1 atm, 273K.' PV=nRT → V=nRT/P = (2)(0.0821)(273)/(1) = 44.8 L. (Makes sense: 1 mol=22.4L at STP, so 2 mol=44.8L!) Example 2: 'Find P of 0.5 mol gas in 10L at 300K.' P=nRT/V = (0.5)(