In an exothermic reaction, energy is

released and the surroundings warm

Adding a catalyst to a reaction

lowers the activation energy without changing the enthalpy change

enough energy and the correct orientation

grinding the solid into a powder

there are more frequent collisions

12questions. Pick an answer and you'll see why right away.

In an exothermic reaction, energy is
A reaction is written as reactants + energy goes to products. This reaction is
On a potential energy diagram, the activation energy is the energy from the reactants to
On a potential energy diagram, if the products are lower than the reactants, the reaction is
Adding a catalyst to a reaction
According to collision theory, a reaction occurs only when particles collide with
Which change will increase the rate of a reaction between a solid and a solution?
Increasing the concentration of a reactant increases the rate because
At dynamic equilibrium, the rates of the forward and reverse reactions are
For $\text{N}_2 + 3\,\text{H}_2 \rightleftharpoons 2\,\text{NH}_3$ , adding more $\text{N}_2$ shifts the equilibrium
For a gaseous equilibrium, increasing the pressure shifts the system toward the side with
Raising the temperature of a system at equilibrium shifts it in the