EXAMPLE 1.I THE ROCKET ENGINE A rocket engine,Fig.E1.1,burns a stoichiometric mixture of fuel (liquid hydro- gen)in oxidant (liquid oxygen).The combustion chamber is cylindrical,75 cm long and 60 cm in diameter,and the combustion process produces 108 kg/s of exhaust gases.If combustion is complete,find the rate of reaction of hydrogen and of oxygen. Complete combustion H2 60 cm 108 kg/s 02 75cm- Figure E1.1 SOLUTION We want to evaluate 1 dNH. -=v dt and -ro:=di 14 14