Answer to Question #103280 in Physical Chemistry for Akshay Kumar

Question #103280

Define standard enthalpy of formation and describe a method for its direct
determination with the help of an example.

Expert's answer

The standard enthalpy of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

Example: C(s, graphite) + O₂(g) → CO₂(g)

The standard enthalpy of formation of CO₂(g) can be determined as the enthalpy of combustion of graphite and measured using bomb calorimeter.

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28.04.20, 19:35

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Yogita sharma

23.04.20, 06:38

Carbon gets exchanged between lithosphere, hydrogen and atmosphere of earth explain with diagram.

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anirudh

29.03.20, 18:30

Small but useful and accurate answer. goood