Question

Given the following data: mno(s) + h2(g) mn(s) + h2o(l), h = 100 kj mno2(s) + 2 h2(g) mn(s) + 2 h2o(l), h = -52 kj use hess's law to calculate the heat of the reaction mno2(s) + h2(g) mno(s) + h2o(l).