A mass of 10 kg s −1 of Cu(O3)2 ∙ 6H2O along with 13 kg s −1 of water, both at 25 ℃, are fed to a tank where mixing takes place. The resulting solution passes through a heat exchanger which adjusts its temperature to 25 ℃. What is the rate of heat transfer in the exchanger? • For Cu(O3)2, ΔHf298 o = −302.9 k • For Cu(O3)2 ∙ 6H2O, ΔHf298 o = −2,110.8 k • The heat of solution of 1 mol of Cu(O3)2 in water at 25 ℃ is -47.84 kJ, independent of ñ for values of interest here.