Calculate the H for the reaction NO (g) -> 1/2N 2(g) + 1/2O 2(g)
Given the following information:
1/2N 2(g) + O 2(g) -> NO 2(g) H = +33.8 kJ/mol
NO (g) + 1/2O 2(g) -> NO 2(g) H = -56.6 kJ/mol

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]