How many reactant gas molecules, How many gas molecules are there, Does the entropy increase ore decrease in the following N2(g) +3H2(g) -> 2 NH3(g)

Question

In the reaction given below, give the following answers (separate each answer with a comma and space): a) How many reactant gas molecules are there? b) How many product gas molecules are there? c) Does the entropy increase or decrease (choose one word - increase or decrease).

N2(g) + 3H2 (g) --> 2 NH3(g)

Answer 1

There are 4 moles of reactant; there are two moles of product.

Entropy decreases because there are fewer moles of products than there are of reactants.