Question

Give the values of ΔHo, ΔSo, and T, determine ΔGo and indicate if the reaction is spontaneous. ΔHo = 115 kJ , ΔSo = 263 J/K , and T = 615K ΔGo=___ kJ Spontaneous? yes or no

Answer 1

Answer:

$\Delta G^0=-46.745\ kJ$

$\Delta G^0<0$, the reaction is spontaneous.

Explanation:

The expression for the standard change in free energy is:

$\Delta G^0=\Delta H^0-T\times \Delta S^0$

Given that:

$\Delta H^0=115\ kJ$

$T=615\ K$

$\Delta S^0=263\ J/K$

Also, 1 J = 10⁻³ kJ

So,

$\Delta S^0=0.263\ kJ/K$

Applying in the above formula as:

$\Delta G^0=115-615\times 0.263\ kJ$

$\Delta G^0=-46.745\ kJ$

Since, $\Delta G^0<0$, the reaction is spontaneous.