Heat of reaction `(DeltaH)` is given by

For which of the following reactions heat of formation (Delta_(f)H) is equal to DeltaH//2 ?

If for a reaction, DeltaH is negative and DeltaS is positive then the reaction is

If DeltaH_(f)(X) , DeltaH_(f)(Y) , DeltaH_(f)(R ) and DeltaH_(f)(S) denote the enthalpies of formation of X , Y , R and S respectively, the enthalpy of the reaction X+YtoR+S is given by

If DeltaH_(f)(X) , DeltaH_(f)(Y) , DeltaH_(f)(R ) and DeltaH_(f)(S) denote the enthalpies of formation of X , Y , R and S respectively, the enthalpy of the reaction X+YtoR+S is given by

Enthalpy of reaction DeltaH is expressed as

For the reaction H_(2)+I_(2)hArr2NHI , DeltaH=12.40 kcal . The heat of formation (DeltaH) of HI is

For the reaction H_(2)+I_(2)hArr2HI , DeltaH=12.40 kcal . The heat of formation (DeltaH) of HI is