Fe2O3, PbO and Cu2O present in a dead roasted tin ore react according to the following equations, during leaching with 1.11 M HCl (= HCl (50 H2O)) at 25 C (298 K): + ( ) = ( ) + + ( ) = ( ) + + ( ) = ( ) + Calculate the heat of the leaching process at 25 oC per 100 kg of ore,