Chemistry Labs

International Chemistry Olympiad · 1973

Problems

  1. Problem 2A mixture of a gaseous hydrocarbon and oxygen is placed in a 1 dm3^3 vessel at 406.5 K and 101 325 Pa. The oxygen present is twice the stoichiometric amount required for combustion. After combustion, the pressure in the vessel at the same temperature increases by 5 %. Determine the molecular formula of the hydrocarbon if the mass of water formed was 0.162 g. (R=8.314R = 8.314 J mol−1^{-1} K−1^{-1})Solutions: 1