Evaluate `DeltaU` at `500K` for the process
`Mg(s)+2HC1(g)=MgC1_(2)(s)+H_(2)(g)`
`DeltaH=-109Kcal`
The volume change of solids to be ignored

The heat change accompanying the reaction 2H_(2)(g)+O_(2)(g) to 2H_(2)O(l) : DeltaH= -136kcal is called

The heat change accompanying the reaction 2H_(2)(g)+O_(2)(g) to 2H_(2)O(l) : DeltaH= -136kcal is called

The heat change for the following reaction at 298 K and constant pressure is +7.3 kcal A_(@)B(s)to2A(s)+(1)/(2)B_(2)(g) , DeltaH=+7.3 kcal The heat change at constant volume would be

The heat change for the following reaction at 298 K and constant pressure is +7.3 kcal A_(@)B(s)to2A(s)+(1)/(2)B_(2)(g) , DeltaH=+7.3 kcal The heat change at constant volume would be

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

Assertion : For the change, H_(2)O_((l))rarr H_(2)O_((s)),DeltaH=DeltaU . Reason : No enthalpy change is involved in this process.

Assertion : For the change, H_(2)O_((l))rarr H_(2)O_((s)),DeltaH=DeltaU . Reason : No enthalpy change is involved in this process.