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WARRIOR [948]
4 years ago
15

Calculate the standard enthalpy of the reaction, ΔH∘rxn, for the thermite reaction:

Chemistry
1 answer:
Kryger [21]4 years ago
6 0

Answer:

The answer to your question is ΔH rxn = - 849.5 kJ/mol

Explanation:

Reaction

                   2Al(s)  + Fe₂O₃ (s)   ⇒   2Fe (s)   +  Al₂O₃ (s)

Enthalpy of reaction

ΔHrxn =  ∑ H products - ∑ H reactants

ΔHrxn = ∑( H (Al₂O₃) + H (Fe)  - ∑ ( H Fe₂O₃ + H Al)

ΔHrxn = [-1675 + 0] - [ -825.5 + 0]

ΔHrxn = -1675 + 825.5

ΔHrxn = - 849.5 kJ/mol

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