Rates of Reactions

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number written in front of a chemical formula that indicates the number of molecules or moles of that substance involved in the reaction.

Front

How does increasing temperature affect the activation energy of a reaction?

Back

Increasing the temperature does not change the activation energy of a reaction; it increases the energy of the reactants, allowing more of them to overcome the activation energy barrier.

Front

What happens to energy in an exothermic reaction?

Back

In an exothermic reaction, energy is released into the surroundings.

Front

What is the relationship between collision frequency and reaction rate?

Back

As the frequency of collisions between reactant particles increases, the rate of reaction also increases.

Front

Define activation energy.

Back

Activation energy is the minimum amount of energy required for a chemical reaction to occur.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings.

Front

Explain the concept of reaction rate.

Back

Reaction rate is the speed at which reactants are converted into products in a chemical reaction.

Front

What role do catalysts play in chemical reactions?

Back

Catalysts increase the rate of a chemical reaction by lowering the activation energy required for the reaction to occur.

Front

What is the effect of concentration on reaction rate?

Back

Increasing the concentration of reactants generally increases the rate of reaction, as there are more particles available to collide.

Front

How does surface area affect reaction rates?

Back

Increasing the surface area of a reactant increases the rate of reaction, as it allows more particles to collide.