Question

In: Chemistry

Estimate ΔG°rxn for the following reaction at 407 K. HCN(g) + 2 H2(g) → CH3NH2(g) ΔH°=...

Estimate ΔG°rxn for the following reaction at 407 K. HCN(g) + 2 H2(g) → CH3NH2(g) ΔH°= -158.0 kJ; ΔS°= -219.9 J/K

answer choices

-68.5 kJ

+247 kJ

-247 kJ

+68.5 kJ

+61.9 kJ

Solutions

Expert Solution

Given that

ΔH°= -158.0 kJ

ΔS°= -219.9 J/K = -0.2199 kJ/K

T = 407K

We know tht ΔG° = ΔH° - T ΔS°

= -158.0 kJ - (407 K) (-0.2199 kJ/K)

= -68.5 kJ

Therefore,

ΔG°rxn = -68.5 kJ

queen_honey_blossom answered 2 years ago
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