`25^(@)C`,the enthalpy of the following processes are given:
`H_(2)(g)+O_(2)(g) rarr H_2O_2 ,Delta H^(@)=78kJmol^(-1)`
`H_(2)(g)+1/2 O_(2)(g)rarr H_(2)O(g),Delta H^(@)=242kJmol^(-1)`
`H_(2)(g) to 2H(g) ,Delta H^(@)=436 kJmol^(-1)`
`1/2 O_2(g) rarr O(g), Delta H^(@)=249 kJmol^(-1)`
What would d be the value of X for the following reaction ?_______(Nearest integer)
`H_(2)O(g) rarr H(g)+OH(g) DeltaH^(@)=kJmol^(-1)`