Module 7 Chemistry Test Review

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings, resulting in an increase in temperature.

Front

How does an increase in temperature affect the rate of a chemical reaction?

Back

An increase in temperature increases the collision frequency between particles, thus increasing the rate of the reaction.

Front

What effect does pressure have on gases?

Back

Changes in pressure primarily affect gases, as they can compress and expand, altering their volume and behavior.

Front

What is a catalyst?

Back

A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.

Front

What is chemical equilibrium?

Back

Chemical equilibrium is the state in which the rate of the forward reaction equals the rate of the backward reaction, resulting in no net change in the concentration of reactants and products.

Front

What is the role of reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change to form products.

Front

What are products in a chemical reaction?

Back

Products are the substances formed as a result of a chemical reaction.

Front

What is the difference between a solid, liquid, and gas in terms of particle arrangement?

Back

In solids, particles are closely packed in a fixed arrangement; in liquids, particles are close but can move past each other; in gases, particles are far apart and move freely.

Front

What is the significance of collision theory in chemistry?

Back

Collision theory states that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.