0973 05 Chemical Energetics CORE

Front

What is an exothermic reaction?

Back

A reaction that transfers energy to the surroundings

Front

What does it mean if the overall energy change of a reaction is negative?

Back

the reaction is exothermic

Front

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

Back

They increase. The thermometer is included in "the surroundings" so shows the temperature increasing.

Front

If the reactants have more energy than the products, what kind of a reaction must have taken place?

Back

An exothermic one. The missing energy has been transferred to the surroundings.

Front

State two examples of exothermic reactions.

Back

Combustion, respiration, most neutralization reactions

Front

State two uses of exothermic reactions

Back

Self-heating cans, hand warmers

Front

What is an endothermic reaction?

Back

A reaction that takes in energy from the surroundings

Front

What does it mean if the overall energy change of a reaction is positive?

Back

the reaction is endothermic

Front

If the reactants have less energy than the products, what kind of a reaction must have taken place?

Back

An endothermic one. The extra energy has been take in by the surroundings.

Front

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

Back

They decrease. The thermometer is included in "the surroundings" so shows the temperature decreasing.