Find the ah and au for the target reaction at 25 c. use the given information target: h2so4(1) ► s03(g) +h2o(g) given (at 25 c) h s(g) +2 o2(g) → h2so4(1) ah=-235.5 kj/mol h2s(g) +2 02(g) → so2(g) + h2o(1) ah = -207 kj/mol h2o(l) → h2o(g) ah = 44 kj/mol