Question

65. In car racing, one advantage of mixing liquid nitrous oxide (N2 O) with air is that the boiling of the “nitrous” absorbs latent heat of vaporization and thus cools the air and ultimately the fuel-air mixture, allowing more fuel-air mixture to go into each cylinder. As a very rough look at this process, suppose 1.0 mol of nitrous oxide gas at its boiling point, −88 °C , is mixed with 4.0 mol of air

(assumed diatomic) at 30 °C . What is the final temperature of the mixture? Use the measured heat capacity

of N2O at 25°C,whichis 30.4J/mol°C.(Theprimary

advantage of nitrous oxide is that it consists of 1/3 oxygen, which is more than air contains, so it supplies more oxygen to burn the fuel. Another advantage is that its decomposition into nitrogen and oxygen releases energy in the cylinder

Answer 1