If heat of formation of HI in the given reactions (i) H_(2)(g) + I_(2) to I_(2)(s) to 2HI (ii) H_(2)(g) +I_(2)(g)to 2HI(g) are 26 KJ and -4.5 "mol"^(-1) + respectively , then the heat of sublimation of iodine is

If heat of formation of HI in the given reactions (i) H_(2)(g) + I_(2

1.	If heat of formation of HI in the given reactions (i) H_(2)(g) + I_(2) to I_(2)(s) to 2HI (ii) H_(2)(g) +I_(2)(g)to 2HI(g) are 26 KJ and -4.5 "mol"^(-1) + respectively , then the heat of sublimation of iodine is
Answer» 30.5 KJ 61.0 KJ 21.5 KJ `-30.5 KJ` Solution :In order to GET enthalpy of SUBLIMATION multiply the heat of FORMATION given for per mole by 2 and then subtract (ii) and (i) `DeltaH=26xx2-(-4.5xx2)=61.0` KJ