Problem 312 marks Acetylene is hydrogenated to form ethane. The feed to the reactor contains 1.50molH2/mol C2H2 (a) Calculate the stoichiometric reactant ratio ( (molH2 react/mol C2H2 react) and the yield ratio ( kmolC2H6 formed/ kmolH2 react). (b) Determine the limiting reactant and calculate the percentage by which the other reactant is in excess. (c) Calculate the mass feed rate of hydrogen (kg/s) required to produce 4106 metric tons of ethane per year, assuming that the reaction goes to completion and that the process operates for 24 hours a day, 300 days a year. (d) There is a definite drawback to running with one reactant in excess rather than feeding the reactants in stoichiometric proportion. What is it? [ Hint: In the process of part (c), what does the reactor effluent consists of and what will probably have to be done before the product ethane can be sold or used?] Problem 4 -10 marks Ammonia is burned to form nitric oxide in the following reaction: 4NH3+5O24NO+6H2O (a) Calculate the ratio (lb-mole O2 react/lb-mole NO formed). (b) If ammonia is fed to a continuous reactor at a rate of 100.0kmolNH3/h, what oxygen feed rate (kmol/h ) would correspond to 40.0% excess O2 ? (c) If 50.0kg of ammonia and 100.0kg of oxygen are fed to a batch reactor, determine the limiting reactant, the percentage by which the other reactant is in excess, and the extent of reaction (mol) and mass of NO produced (kg) if the reaction proceeds to completion