Enthalpy

Question 1

Standard Enthalpy of Formation?

Answer 1

1 mol of compound formed by its elements under standard states and conditions

Question 2

Standard Enthalpy of Combustion?

Answer 2

When 1 mol of a substance is fully combusted in oxygen under standard states and conditions

Question 3

Standard Enthalpy of a Reaction?

Answer 3

Difference between total reactant molar enthalpies and total product molar enthalpies calculated for a substance under their standard states.

Question 4

Hess’s Law

Answer 4

Enthalpy change accompanying a chemical change is independent on the route which the chemical reaction occurs

Question 5

Mean Bond Enthalpy

Answer 5

Energy required to break or make 1 mol of a covalent bond under standard states and conditions