BRAINCAKEEnthalpy Change of Reaction
The standard enthalpy change of reaction ΔrHθ is the enthalpy change that accompanies a reaction in the molar quantities shown in a chemical equation under standard conditions, with all reactants and products in their standard states.
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- Stoichiometry
- The reacting ratio of moles of reactants and products in a balanced chemical equation.
- Enthalpy
- A measure of the total energy of a chemical system.
- Enthalpy change
- The heat energy that is transferred between the system and its surroundings during a process carried out at constant pressure.
- Standard conditions
- A pressure of 100 kPa, a temperature of 298 K, and, for solutions, a concentration of 1 moldm-3.
More in Enthalpy
- Enthalpy and Enthalpy Changes
- Endothermic and Exothermic Reactions
- Activation Energy
- Standard Enthalpy Changes and Standard Conditions
- Enthalpy Change of Formation
- Enthalpy Change of Combustion
- Enthalpy Change of Neutralisation
- Measuring the Enthalpy Change of Combustion
All 19 lessons in Enthalpy · All OCR AS-level Chemistry topics