14. In general, increasing the concentrations of reactants increases the reaction rate because
a. the molecular speed increases
b. the entropy of the system increases
c. the reaction becomes more spontaneous
d. the number of effective collisions increases
15. C2H4 + Pt + H2 + heat = C2H6 + Pt
What is the catalyst in the reaction above?
a. C2H4
b. Pt
c. H 2
d. heat
e. C2H6
16. A chemical equilibrium occurs
a. when the concentration of the products is the same as the reactants
b. only without catalysts
c. when the forward and reverse reaction rates are the same
d. when the activation energy is lowered
a. the molecular speed increases
b. the entropy of the system increases
c. the reaction becomes more spontaneous
d. the number of effective collisions increases
15. C2H4 + Pt + H2 + heat = C2H6 + Pt
What is the catalyst in the reaction above?
a. C2H4
b. Pt
c. H 2
d. heat
e. C2H6
16. A chemical equilibrium occurs
a. when the concentration of the products is the same as the reactants
b. only without catalysts
c. when the forward and reverse reaction rates are the same
d. when the activation energy is lowered