Condisder the reaction, 3NO2(g) + H2O(l) --> 2 HNO3(aq) + NO(g), where TRIANGLE H=-137kJ. How many kilojoules are released when 82.8 g of NO2 reacts? when i say triangle H i mean the heat that is released. How many kJ are released when 82.8 g of NO2 reacts?