During an endothermic chemical reaction, four moles of gaseous reactants are turned into two moles of gaseous products. a. Yes b. No c. Can't decide with information given.

reaction is non spontaneous

Explanation:

In the question number of moles of decrease as the reactants turn into product

When number of moles of gas decreases, the entropy also decreases (∆S = negative) and since process is endothermic (∆H=positive)

now,

ΔG = ΔH-TΔS

since, ΔS is negative and ΔH the, ΔG will be positive as well. Since, ΔG is positive the reaction must be non-spontaneous.