1. Calculate the heat for the overall reaction: Mg(s)+1/O2(g)MgO(s) given the heats of reaction below: Mg(s)+2HCl(aq)MgCl2(aq)+H2(g)H=143kJMgO(s)+2HCl(aq)MgCl2(aq)+H2O(g)H=216kJH2(g)+V2O2(g)H2O(l)H=285kJ a. 644kJ b. +74kJ c. +644kJ d. 212kJ e. 74kJ 10. Compound A(s) is decomposed into B(g) and C(g). Equilibrium constant of this reaction is given as K=32. Determine the partial pressure of B at equilibrium. A(s)B(g)+2C(g)