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nickname0097
28.09.2019 •
Chemistry
Calculate the heat of reaction for the combustion of one mole of benzene molecules (ch) at 25 (given the ahe: (co()] = -393.5 kj/mol, (h.0(0)] = -285.8 kj/mol, (ch(b)] = 82.6 kl/mol)
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Ответ:
ΔHf = 3301 kJ/mol
Explanation:
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.
In a reaction ΔHf = ∑ n ΔHproducts - ∑ n ΔHreagents
Where n are moles
For the reaction:
1 C₆H₆ + 7.5 O₂ → 6 CO₂ + 3 H₂O
The ΔHf = -285,8 kJ/mol × 3 - 393,5 kJ/mol×6 - [82,6 kJ/mol×1 -0kJ/mol×7,5]
ΔHf = 3301 kJ/mol
I hope it helps!
Ответ: