For the reaction 2Cu(s) + S(s) → Cu2S(s) ∆Ho and ∆Go are

For the reaction
2Cu(s) + S(s) → Cu2S(s)
∆Ho and ∆Go are negative and ∆So is positive.
a. At equilibrium, will reactants or products predominate? Why?
b. Why must the reaction system be heated in order to produce copper (I) sulfide?