Question

Is the haber process for the industrial synthesis of ammonia spontaneous or nonspontaneous under standard conditions at 25 ∘c? n2(g)+3h2(g)→2nh3(g) δh∘=−92.2 kj; δs∘=−199 j/k?

Answer 1

The industrial synthesis of ammonia is spontaneous.

to to prove this one calculate the gibbs free energy(delta G)

= delta G = Delta H -T delta s

delta H = -92.2 kj in joules -92.2 x1000 =-92200j
delta s = -199j/k
T= 25+273= 298k

delta G is therefore= -92200-298(-199)=-32898j
since delta G is negative the reaction is therefore spontaneous