Three hundred l/h of a 20 mole% c3h8–80% n-c4h10 gas mixture at 0°c and 1.1 atm and 200 l/h of a 40 mole% c3h8–60% n-c4h10 mixture at 25°c and 1.1 atm are mixed and heated to 227°c at constant pressure. enthalpies of propane and n-butane are listed below. assume ideal-gas behavior.

propane butane

t(°c) h^(j/mol ) h^(j/mol )

0 0 0

25 1772 2394

227 20,685 27,442

(a) calculate the heat requirement in kj/h.

(b) where in your calculations did you use the ideal-gas assumption? (just need part b)

will rate : )