Question

1. what would increase the temperature during a chemical reaction?

a. the surface area of the product particles decreased.
b. the concentrations of the product particles decreased.
c. the collision rate of the reactant particles increased.
d. the concentrations of the reactant particles increased.

1. how do gas molecules compare to liquid molecules

a. the molecules are closer together as a gas than they are as a liquid
b. the molecules move faster as a gas than they do as a liquid.
c. the molecules are larger as a gas than they are as a liquid.
d. the molecules weigh less as a gas than they do as a liquid.

Explanation:

For question 2: Increasing temperature raises the kinetic energy of reactant particles, making them move faster and collide more frequently and with greater energy, which increases the collision rate of reactant particles.
For question 3: Gas molecules have higher kinetic energy than liquid molecules, so they move faster; the mass/size of molecules does not change with state, and gas molecules are farther apart than liquid molecules.

Answer:

1. c. The collision rate of the reactant particles increased.
2. b. The molecules move faster as a gas than they do as a liquid.