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In which of the reactions below is ΔH not an enthalpy of formation? Group of answer choices Both...

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Chemistry

In which of the reactions below is ΔH not an enthalpy offormation?

Group of answer choices

Both b and c are not enthalpy of formation reactions.

2C(s) + O2(g) → 2CO(g)

Mg(s) + Cl2(g) → MgCl2(s)

Ca(s) + 1/2O2(g) → CaO(s)

C(s) + O2(g) → CO2(g)

Answer & Explanation Solved by verified expert
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Ans In all the reaction Horxn is only an Enthalpy of formation Explanation Enthalpy of reaction is the defference between the net enthalpy of formation of products net enthalpy of formation of products ie Horxn sumation of enthalpy of formation    See Answer
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