The reaction stoichiometry and standard heat of the reaction on in butane vapor is shown here:

$C_4{H}_{10(g)}+\frac{13}{2}{O}_{2(g)}4C{O}_{2(g)}+5H_2{O}_{(l)},H_r^o=-2900k\frac{J}{m}ol$

Assume that $40mo\frac{l}{s}$ of $C{O}_2$ is produced in this reaction and the reactants and products are all at $25C.$ The fresh feed to the reactor contains $20mo\frac{l}{s}$ of $C{O}_2.$ Calculate the rate of change in enthalpy $H^{}(k\frac{J}{s}).$