Thermochemistry

Question 1

Tenperature

Answer 1

The average kinetic energy of 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 (kJ. Mol-1)

Question 3

Heat of reaction

Answer 3

The net change of chemical potential energy of a system during a chemical reaction (KJ.Mol-1)

Question 4

Activated complex

Answer 4

A temporary transition state between the reactants and the products

Question 5

Activation energy

Answer 5

The minimum energy required to start a chemical reaction

Question 6

Exothermic reaction

Answer 6

A chemical reaction that transfers chemical potential energy into thermal energy

Question 7

Endothermic reaction

Answer 7

A chemical reaction that transfers thermal energy into chemical potential energy

Question 8

Catalyst

Answer 8

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

Question 9

Chemical reaction:

Answer 9

A process whereby chemical bonds are broken and reformed to produce a new substance