T8

Question 1

Endothermic?

Answer 1

A reaction in which the enthalpy of the products is greater than the enthalpy of the reactants

Question 2

Exothermic?

Answer 2

A reaction in which the enthalpy of the reactants is greater than the enthalpy of the products

Question 3

Standard conditions?

Answer 3

298K and 100kPa

Question 4

Standard enthalpy change?

Answer 4

Change in heat energy at constant pressure, measured at standard conditions

Question 5

Standard enthalpy of combustion?

Answer 5

The enthalpy change when one mole of substance is completely burnt in oxygen under standard conditions

Question 6

Standard enthalpy of formation?

Answer 6

The enthalpy change when one mole of a compound is formed from its elements under standard conditions

Question 7

Standard enthalpy of neutralization?

Answer 7

The enthalpy change when one mole of water is produced in a neutralization reaction under standard conditions

Question 8

Conservation of energy?

Answer 8

Energy cannot be created or destroyed but it can be changed from one form to another

Question 9

Hess’s Law?

Answer 9

The enthalpy change of a reaction is independent of the route taken, provided the initial and final conditions are the same

Question 10

Average bond enthalpy?

Answer 10

The energy required to break one mole of a given bond averaged over many compounds