Enthalpy Changes

Question 1

Enthalpy Change

Answer 1

heat transferred in a reaction at constant pressure

Question 2

⦵

Answer 2

Standard pressure and temp

Question 3

Enthalpy change of reaction

Answer 3

Enthalpy change when a reaction occurs at the molar quantities shown in the chemical equation under standard conditions and with all reactants and products in their standard states

Question 4

Enthalpy change of formation

Answer 4

Enthalpy change when 1 mol of a compound is formed from elements at standard states under standard conditions

Question 5

Enthalpy change of combustion

Answer 5

Enthalpy change when 1 mol of substance completely combusts in oxygen under standard conditions with all reactants and products in standard states

Question 6

Enthalpy change of neutralisation

Answer 6

Enthalpy change when solution of acid and alkali react together to form 1 mole of H2O under standard conditions

Question 7

Average bond enthalpy

Answer 7

The energy required to break one mol of bonds averaged between two atoms over a range of compounds