Three hundred L/h of a 25.0 mole%C3H8 - 75.0% n-C4H10 mixture at 0C and 1.10 atm and 300.0L/h of a 50.0 mole%C3H8 - 50.0%n- C4H10 mixture at 25C and 1.10 atm are mixed and heated to 227C at constant pressure. Enthalpies of propane and n-butane are listed below. Assume ideal-gas behavior. Propane Butane T(C) H (1/mol) (1/mol) 0 0 0 25 1772 2394 227 20,685 27,442 Calculate the heat requirement. i kJ/h