BRAINCAKEEnthalpy Change of Combustion
The standard enthalpy change of combustion ΔcHθ is the enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions with all the reactants and products in their standard states.
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Key terms in this lesson
- Mole
- The amount of substance that contains as many particles as there are atoms in exactly 12g of carbon-12.
- 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.
- Exothermic
- Describes a process in which heat energy is transferred from the system to the surroundings, so the enthalpy change is negative.
- Standard conditions
- A pressure of 100 kPa, a temperature of 298 K, and, for solutions, a concentration of 1 moldm-3.
More in Enthalpy
- Activation Energy
- Standard Enthalpy Changes and Standard Conditions
- Enthalpy Change of Reaction
- Enthalpy Change of Formation
- Enthalpy Change of Neutralisation
- Measuring the Enthalpy Change of Combustion
- Accuracy of Experimental Value
- Determining the Enthalpy Change of a Reaction
All 19 lessons in Enthalpy · All OCR AS-level Chemistry topics