Summative test

Front

Why is refrigeration used to preserve food?

Back

Refrigeration decreases the collision frequency of molecules involved in spoilage.

Front

How does increasing the surface area of a solid reactant speed up a reaction, such as in combustion?

Back

It increases the frequency of reactant collisions.

Front

Why is it important to control the temperature when producing certain materials, like plastics?

Back

Precise temperature control ensures the desired reaction rate and product formation.

Front

How does a fire extinguisher work to control fire?

Back

It removes oxygen from the reaction, starving the fire.

Front

Why are catalysts used in many industrial processes?

Back

Catalysts increase the reaction rate without being consumed.

Front

How does the use of inhibitors help prevent corrosion?

Back

Inhibitors slow down the corrosion reaction.

Front

Why is it crucial to monitor and control the concentration of reactants in many chemical processes?

Back

Precise concentration control ensures the desired reaction rate and product yield.

Front

Why are certain chemical reactions carried out at low temperatures?

Back

Low temperatures can slow down unwanted side reactions.

Front

How does using a pressure cooker speed up the cooking process?

Back

It increases the pressure, increasing the collision frequency of molecules.

Front

A gas occupied 12.3 L at a pressure of 40.0 mmHg. What is the volume when the pressure is increased to 60.0 mmHg at constant temperature?

Back

8.2 L