Amixture of propane (caha) and butane (ch) is burned with excess oxygen. the product gas analysis is found to contain 37 mol % co , and 47 mol % h20 and the remainder 02 basis. all the fuel mixture is completely burnt. a) draw and clearly labeled flow diagram for the process. perform a degree of freedom analysis for this process with all the terms clearly specified and state your conclusion. [5 on a wet on points] b) considering 100 mol/s of the reactor outlet stream as the basis, calculate the ratio of moles of propane to butane in the fuel. [10 points] calculate the composition of the product gas on a dry basis. [3 points c) d) calculate the percentage excess of oxygen.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.