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# The solution to Enthalpy change

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Consider the following reaction:
2Mg + 02 --> 2MgO Delta H = -1204kJ

Calculate the amount of heat transferred when 2.2g of Mg reacts at constant pressure.

How many grams of MgO are produced during an enthalpy change of -94.0kJ ?

How many kilojoules of heat are absorbed when 7.80g of MgO is decomposed into Mg and O2 at constant pressure?

© BrainMass Inc. brainmass.com September 22, 2018, 9:14 am ad1c9bdddf - https://brainmass.com/chemistry/energetics-and-thermodynamics/solution-enthalpy-change-149427

#### Solution Preview

Please see the attached file.

Consider the following reaction:
2Mg + 02 --> 2MgO Delta H = -1204kJ

Calculate the amount of heat transferred when 2.2g of Mg reacts at constant pressure.
# mol ...

#### Solution Summary

Change of enthalpy of the reaction is investigated. The expert determines how many grams of MgO are produced during an enthalphy change.

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