The enthalpy change in the reaction :
`2CO+O_(2)to2CO_(2)`
is termed as

The enthalpy change for the reaction, C_(2)H_(4)(g)+3O_(2)(g)to2CO_(2)(g)+2H_(2)(g) is called:

Calculate the enthalpy change for the reaction Fe_2O_3 +3CO to 2Fe +3CO_2 from the following data. 2Fe +3/2 O_2 to Fe_2O_3 , DeltaH =-741 kJ C+1/2O_2 to CO , DeltaH =-137 kJ C+O_2 to CO_2 , DeltaH =-394.5 kJ