Enthalpy change

Enthalpy change
Energy exchange between a chemical reaction and its surroundings at constant pressure
1 of 12
Standard conditions
A pressure of 100kPa, temperature of 298K or 25C and the substance in the reaction is in normal physical state
2 of 12
Bond energy
The energy needed to break 1 mole of a particular bond in 1 mole of gaseous molecule at standard condition
3 of 12
Enthalpy change of reaction
Enthalpy change when the amounts of reactants shown in the equation react to give products under standard conditions. The reactants and products must be in their standard states
4 of 12
Enthalpy change of formation
Enthalpy change when one mole of a compound is formed from its elements under standard conditions. The reactants and products must be in their standard states
5 of 12
Enthalpy change of combustion
Energy change when one mole of a substance is burnt completely in excess oxygen under standard conditions. The reactants and products must be in their standard states
6 of 12
Enthalpy change of neutralisation
Enthalpy change when one mole of water is formed by the reaction of an acid with an alkali under standard conditions
7 of 12
Enthalpy change of solution
Enthalpy change when one mole of solute is dissolved in a solvent to form an infinitely dilute solution under standard conditions
8 of 12
Enthalpy change of atomisation
Enthalpy change when one mole of gaseous atoms is formed from its element in its standard state under standard conditions
9 of 12
Enthalpy change of hydration of an anhydrous salt
Enthalpy change when one mole of a hydrated salt is formed from one mole of the anhydrous salt under standard conditions
10 of 12
Enthalpy change of hydration
Enthalpy change of one mole of ions in the gas phase are dissolved in water
11 of 12
Hess's Law
The total enthalpy change in a chemical reaction is independent of the route by which the chemical reaction takes place as long as the initial and final conditions are the same
12 of 12

Other cards in this set

Card 2

Front

A pressure of 100kPa, temperature of 298K or 25C and the substance in the reaction is in normal physical state

Back

Standard conditions

Card 3

Front

The energy needed to break 1 mole of a particular bond in 1 mole of gaseous molecule at standard condition

Back

Preview of the back of card 3

Card 4

Front

Enthalpy change when the amounts of reactants shown in the equation react to give products under standard conditions. The reactants and products must be in their standard states

Back

Preview of the back of card 4

Card 5

Front

Enthalpy change when one mole of a compound is formed from its elements under standard conditions. The reactants and products must be in their standard states

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Enthalpy resources »