11 Gas Stoichiometry 2C4H10(g) + 13O2(g) 8CO2(g) + 10H2O(g) What type of reaction is this?How many moles of butane gas react with how many moles of oxygen gas?
12 2C4H10(g) + 13O2(g) 8CO2(g) + 10H2O(g) Gas Stoichiometry2C4H10(g) + 13O2(g) 8CO2(g) + 10H2O(g)Avogadro’s Principle: = V of gas at same T & P contain = # of particles Coefficients represent not only molar amounts, but also relative volumes
13 Gas Stoichiometry- Volume Only CH4(g) + 2O2(g) CO2(g) + 2H2O (g) It takes 2 L of O2 to react completely with 1 L of CH4 The complete combustion of 1 L of methane produces 1 L of carbon dioxide and 2 L of water vapor. What volume of methane is needed to produced 26 L of water vapor?
14 Gas Stoichiometry- Volume Only What volume of oxygen gas is needed for the complete combustion of 4 L of propane gas? Assume constant pressure and temperature.C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(g)20.0 L O2
15 Gas Stoichiometry- Volume & Mass Balanced chemical equations allow you to find ratios for moles and volume – not for masses!
16 Gas Stoichiometry- Volume & Mass N2(g) + 3H2(g) 2NH3(g) If 5.00 L of nitrogen reacts completely by this reaction at a constant pressure and temperature of 3.00 atm and 298 K, how many grams of ammonia are produced?Givens:VN2 = 5.00 LP = 3.00 atm T = 298 KUnknown: mNH3 = ?
17 N2(g) + 3H2(g) 2NH3(g) Find VNH3. Rearrange Ideal Gas Law equation to solve for n.Convert moles of ammonia to grams.
18 N2(g) +3H2 (g)→ 2NH3(g)What volume of nitrogen at STP would be required to react with mol of hydrogen to produce ammonia?
19 4Fe(s) + 3O2(g) 2Fe2O3(s)Calculate the volume of oxygen gas at STP that is required to completely react with 52.0 g of iron.Convert Fe mass to moles.Determine number of moles of O2.Determine volume of O2 using Ideal Gas Law.Givens:mFe = 52.0 gT = 273 KP = 1 atm15.6 LUnknown:VO2 = ?