Question 2. A homeowner uses 4.00 x 103 m3 of natural gas in a year to heat ahome. Assume that natural gas is all methane, CH4, and that methane is aperfect gas for the conditions of this problem, which are 1.00 atm and20°C. What is the mass of gas used?

What is the temperature of an 11.2-L sample of carbon monoxide, CO, at 744 torr if it occupies 13.3 L at 55 C and 74-4 torr?

Helium-filled balloons rise in the air because the density of helium is less than the density of air. (a) If air has an average molar mass of 29.0 g/mol, what is the density of air at 25C and 770 mm Hg? (b) What is the density of helium at the same temperature and pressure? (c) Would a balloon filled with carbon dioxide at the same temperature and pressure rise?

Butane gas, C4H10, is sold to campers as bottled fuel. Its density at 25C and 1.00 atm is 2.38 g/L. What volume of butane gas at 25C and 1.00 atm is required to heat one gallon of water (d=1.00g/mL) from 25C to 98C ? The reaction for the combustion of butane (H f =125.6kJ/mol) is C4H10(g)+132 O2(g)4CO2(g)+5H2O(g)

97 Homes in rural areas where natural gas service is not available often rely on propane to fuel kitchen ranges. The propane is stored as a liquid, and the gas to be burned is produced as the liquid evaporates. Suppose an architect has hired you to consult on the choice of a propane tank for such a new home. The propane gas consumed in 1.0 hour by a typical range burner at high power would occupy roughly 165 L at 25°C and 1.0 atm, and the range chosen by the client will have six burners. If the tank under consideration holds 500.0 gallons of liquid propane, what is the minimum number of hours it would take for the range to consume an entire tankful of propane? The density of liquid propane is 0.5077 kg/L.

What will be the final temperature of a mixture made from equal masses of the following: water at 25.0C, ethanol at 35.5C, and iron at 95C?