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What is the difference between steam and boiling water?

A scientist measures the standard enthalpy change for the following reaction to be -774.6 kJ: 2NO(g) + 2 H2(g)N2(g) + 2 H2O(l) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(l) is kJ/mol

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A scientist measures the standard enthalpy change for the following reaction to be 150.2 kJ : CaCO3(s)CaO(s) + CO2(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CaO(s) is kJ/mol.

If we do things right, there is nothing to fix. Discuss this statement in relation to the cost of quality where prevention, appraisal, internal failure and external failure constitute cost of quality. 

Calculate the standard enthalpy change of reaction (ΔH°) for the following reaction using the reaction enthalpies and the standard enthalpies of formation (ΔHf°) of the reactants and products:

2SO2(g) + O2(g) -> 2SO3(g)

Given: ΔHf° (SO2) = -296.8 kJ/mol ΔHf° (O2) = 0 kJ/mol ΔHf° (SO3) = -395.6 kJ/mol

Note: All enthalpy changes are given per mole of substance.