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Measuring the Enthalpy Change of Combustion

OCR AS-level ChemistryEnthalpyLesson 9 of 19

A known volume e.g. 150cm3 of water is measured and placed into a beaker.

The initial temperature of the water is taken.

A known mass of substance is burnt in oxygen and the heat released is used to heat the beaker of water.

Diagram

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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.

More in Enthalpy

All 19 lessons in Enthalpy · All OCR AS-level Chemistry topics