2024 ESL Factors Affecting Reaction Rates

Front

What happens to the reaction rate when the concentration of reactants increases?

Back

The reaction rate increases.

Front

Which method will NOT speed up the reaction between magnesium and hydrochloric acid?

Back

Tightly coiling up the strip of magnesium.

Front

What does the law of conservation of mass state?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What occurs to the temperature in an exothermic reaction?

Back

The temperature increases.

Front

How does grinding a seltzer tablet into powder affect the reaction rate?

Back

It increases the reaction rate due to increased surface area.

Front

Define 'reaction rate'.

Back

The speed at which reactants are converted into products in a chemical reaction.

Front

What is the effect of temperature on reaction rates?

Back

Increasing temperature generally increases the reaction rate.

Front

Explain the term 'surface area' in the context of reaction rates.

Back

Surface area refers to the exposed area of a reactant that can participate in a reaction; larger surface area increases reaction rates.

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

How does increasing the pressure affect gas reactions?

Back

Increasing pressure increases the reaction rate by forcing gas molecules closer together.