Module 7 Chemistry Test Review

Front

Changes in pressure will only affect substances that are in the ______ state.

Back

gas

Front

When the rate of the forward reaction is equal to the rate of the backward reaction, the system is said to be in _____

Back

Chemical Equilibrium

Front

In a laboratory, a student combines vinegar and baking soda into a beaker. The initial temperature is 28 degrees Celsius and the final temperature reading two minutes later is 20 degrees Celsius. Is this an endothermic or an exothermic reaction?

Back

endothermic reaction

Front

When an _____ reaction occurs, the reactants are at a lower energy.

Back

endothermic

Front

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction.

Back

catalyst

Front

What is the definition of an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings.

Front

What is the definition of an exothermic reaction?

Back

A reaction that releases heat to its surroundings.

Front

What is chemical equilibrium?

Back

A state in a reversible reaction where the rates of the forward and backward reactions are equal.

Front

What happens to the temperature of the surroundings during an exothermic reaction?

Back

The temperature of the surroundings increases.

Front

What happens to the temperature of the surroundings during an endothermic reaction?

Back

The temperature of the surroundings decreases.