Thermochemistry

Question 1

Temperature

Answer 1

The average kinetic energy of the particles of a substance

Question 2

Bond energy

Answer 2

The amount of energy required to break a bond in one mole of the molecules in which the bond is formed

Question 3

Heat of reaction

Answer 3

The net change of chemical potential energy of a system during a chemical reaction

Question 4

Exothermic reaction

Answer 4

A chemical reaction that transfers chemical potential energy into thermal energy

Question 5

Endothermic reaction

Answer 5

A chemical reaction that transfers thermal energy into chemical potential energy

Question 6

Activated complex

Answer 6

A high energy, unstable, temporary transition state between the reactants and the products

Question 7

Activation energy

Answer 7

The minimum energy required to start a chemical reaction

Question 8

Catalyst

Answer 8

A substance that increases the rate of reaction but remains unchanged at the end of the reaction