Calculate `DeltaS_(universe)` for following chemical reaction
`C(grap hite) +2H_(2) (g) rarr CH_(4)(g);`
`Delta_(f)H^(@)=-74.81kJ` at `298K`.
The standard entropies of `C(grap hite)`, `H_(2)(g)`and `CH_(4)(g)` are `5.740`, `130.684` and `186.264` `J/(K.mol)` respectively.

Calculate the standard enegry change for the reaction: OF_(2)(g) +H_(2)O(g) rarr O_(2)(g) +2HF(g) at 298K The standard enthalpies of formation of OF_(2)(g), H_(2)O(g) , and HF(g) are +20, -250 , and -270 kJ mol^(-1) , respectively.

Calculate Delta_(r)S_("sys")^(@) for the following reaction at 373 K: CO(g) + H_(2)O(g) to CO_(2)(g) + H_(2)(g) Delta_(r)H^(@) = -4.1 xx 10^(4) J, Delta_(r)S^(@)("unv") = 56 J//K

According to the following reaction C(S)+1//2O_(2)(g)rarr CO(g), Delta H=-26.4 Kcal

For the equations C("diamond") +2H_(2)(g) rarr CH_(4)(g) DeltaH_(1) C(g)+4H(g) rarr CH_(4)(g) DeltaH_(2) Predict whther

The standard enthalpy change for the following reaction is 436.4 kJ : H_(2)(g)rarrH(g)+H(g) What is the Delta_(f)H^(@) of atomic hydrogen (H)?

Calculated the equilibrium constant for the following reaction at 298K : 2H_(2)O(l) rarr 2H_(2)(g) +O_(2)(g) Delta_(f)G^(Theta) (H_(2)O) =- 237.2 kJ mol^(-1),R = 8.314 J mol^(-1) K^(-1)

The enthalpy change (Delta H) for the reaction N_(2) (g)+3H_(2)(g) rarr 2NH_(3)(g) is -92.38 kJ at 298 K . What is Delta U at 298 K ?

For the reaction : C_(2)H_(5)OH(l)+3O_(2)(g)rarr2CO_(2)(g)+3H_(2)O(g) if Delta U^(@)= -1373 kJ mol^(-1) at 298 K . Calculate Delta H^(@)

The internal energy change (DeltaU) for the reaction CH_(4)(g) + 2O_(2)(g) to CO_(2)(g) + 2H_(2)O(l) is -885 kJ mol^(-1) at 298K. What is DeltaH at 398 K?

With the help of thermochemical equations given below, determine Delta_(r )H^(Θ) at 298 K for the following reaction: C("graphite")+2H_(2)(g) rarr CH_(4)(g),Delta_(r )H^(Θ) = ? C("graphite")+O_(2)(g) rarr CH_(2)(g), Delta_(r )H^(Θ) = -393.5 kJ mol^(-1) ...(1) H_(2)(g) +1//2O_(2)(g) rarr H_(2)O(l) , Delta_(r )H^(Θ) = -285.8 kJ mol^(-1) ...(2) CO_2(2)(g)+2H_(2)O(l) rarr CH_(4)(g)+2O_(2)(g) , Delta_(r )H^(Θ) = +890.3 kJ mol^(-1) ...(3)