If `H_(2)(g)=2H(g),DeltaH=104cal` , then heat of atomisation of hydrogen is

If H_2(g)=2H(g), triangleH =104 cal, then heat of atomisation of hydrogen is:

Given that: i. C(s) + O_(2)(g) rarr CO_(2)(g) , DeltaH =- 94.05 kcal ii. H_(2)(g) +(1)/(2) O_(2)(g) rarr H_(2)O(l), DeltaH =- 68.32 kcal iii. C_(2)H_(2)(g) +(5)/(2) O_(2)(g) rarr 2CO_(2)(g) +H_(2)O(l),DeltaH =- 310.62 kcal The heat of formation fo acetylene is

Given that: i. C(s) + O_(2)(g) rarr CO_(2)(g) , DeltaH =- 94.05 kcal ii. H_(2)(g) +(1)/(2) O_(2)(g) rarr H_(2)O(l), DeltaH =- 68.32 kcal iii. C_(2)H_(2)(g) +(5)/(2) O_(2)(g) rarr 2CO_(2)(g) +H_(2)O(l), DeltaH =- 310.62 kcal The heat of formation fo acetylene is

Given that: i. C(s) + O_(2)(g) rarr CO_(2)(g) , DeltaH =- 94.05 kcal ii. H_(2)(g) +(1)/(2) O_(2)(g) rarr H_(2)O(l), DeltaH =- 68.32 kcal iii. C_(2)H_(2)(g) +(5)/(2) O_(2)(g) rarr 2CO_(2)(g) +H_(2)O(l),DeltaH =- 310.62 kcal The heat of formation fo acetylene is

The following reaction are given : CH_(4(g))+2O_(2(g))toCO_(2(g))+2H_(2)O(g),DeltaH=-x C_((s))+O_(2(g))toCO_(2(g)),2H_(2(g)),DeltaH=-y H_(2(g))+(1)/(2)O_(2(g))toH_(2)O_((g)),2H_(2(g)),DeltaH=-z calculate the heat of formation of CH_(4) ?

The following reaction are given : CH_(4(g))+2O_(2(g))toCO_(2(g))+2H_(2)O(g),DeltaH=-x C_((s))+O_(2(g))toCO_(2(g)),2H_(2(g)),DeltaH=-y H_(2(g))+(1)/(2)O_(2(g))toH_(2)O_((g)),2H_(2(g)),DeltaH=-z calculate the heat of formation of CH_(4) ?

NH_(3)(g)+3C1_(2)(g)rarrNCL_(3)(g)+3HC1(g)DeltaH_(1) N_(2)(g)+3H_(2)(g)rarr2NH_(3),DeltaH_(2) H_(2)(g)+CL_(2)(g)rarr2HC1(g),DeltaH_(1) The heat of fomation of NC1_(2)(g) in the terms of DeltaH_(1) , DeltaH_(2) and DeltaH_(3) is