Answer to Question #329076 in Physical Chemistry for Ella

Question

Determine if the entropy change will be positive or negative for the following reactions:

H2 + N2 → NH3

Answer 1

3H₂ + N₂ = 2NH₃

From the reactant side, we have 4 moles of gases while the product side has only 2 moles of gas, hence we can say that entropy will decrease. Therefore, the entropy change is negative.