Problem 4.1 (Stolchlometry) Consider the combustion of heptane: How many kilogra

Question

Problem 4.1 (Stolchlometry) Consider the combustion of heptane: How many kilograms of CO2 will be produced as product if 10 kg of CiHs react completely with the stoichiometric quantity of O? Molecular weight of CHs and CO2 are 100.1g/mol and 44 g/mol, respectively. Problem 4.2 (Limiting and Excess Reactants): Hydrogenation of acetylene to form ethane: The reaction starts with 20 kmol H2 and 5 kmol of CaH2. In the reactor there was some initial CaHc. After the reaction total CHs was found 30 kmol. Please find the limiting and excess reactant. What was the initial CaHc amount in the reactor? Problem 4.3 (Extent of Reaction): Ammonia is burned to form nitric oxide in the following reaction: 4NH+502-4NO+6H0 If 50.0 kg of ammonia and 100.0 kg of okygen are fed to a batch reactor, determine percentage excess of reactant and the extent of reaction (mol) if the reaction proceeds to completion Problem 4.4 (Yield and Selectivity): Ethane is chlorinated in a continuous reactor: Some of the product monochloroethane is further chlorinated in an undesired side reaction MacBook Air

Explanation / Answer

Ans 4.1

Moles of C7H16 = mass/molecular weight

= (10 kg) / (100.1 kg/kmol)

= 0.0999 kmol

From the stoichiometry of the reaction

1 kmol of C7H16 produces = 7 kmol CO2

0.0999 kmol of C7H16 produces = 7 x 0.0999

= 0.6993 kmol CO2

Mass of CO2 produced = moles x molecular weight

= 0.6993 kmol x 44 kg/kmol

= 30.769 kg

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