someone could juz tell me roughly how to work out this set of qn plz? i have been thinking and doing alot of workings but none of the ans is remotely close to the ans... :( 1) the reaction below releases 56.6kj of heat at 298k for each mole of NO2 formed at a constant pressure of 1 atm. what is the standard enthalpy of formation of NO2 given the standard enthalpy of NO is 90.4kj mol 2NO + O2 ---> 2NO2 2) a 200g of copper at 100 degrees celsius is dropped into 1000g of water at 25 degrees celsius. what is the final temp of the system? specific heat of water is 4.18J and copper is 0.400 J 3) if the equilibrium constant for A + B <===> C is 0.123, the equilibrium constant when 2C <===> 2A + 2B is?