Enthalpy of combustion of sulphur or carbon

Experimental method for finding enthalpy of combustion using a calorimetric bomb.

This method is suitable for determination of enthalpy of combustion of carbon, Sulphur or sugar but can be used on a liquid fuel

Apparatus

Procedure

1. A known mass, m₁ g, of a substance is placed in a platinum crucible, C.
2. The bomb is filled with oxygen at a pressure of about 20atmospheres and immersed in a known mass (m_w g) of water which is kept stirred.
3. The substance is ignited by passing an electric current through a small coil of iron wire, W.
4. The rise in temperature (θ) of water is read to 0.01⁰C with an accurate thermometer.

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