Question

Which enthalpy change can be calculated using bond enthalpies and/or average bond enthalpies only?

A. 2C3H6(g) + 9O2(g) → 6CO2(g) + 6H2O(l)

B. C5H10(l) + Cl2(g) → C5H10Cl2(l)

C. C5H10(l) + H2O(l) → C5H11OH(l)

D. C3H6(g) + H2(g) → C3H8(g)

Answer 1

The enthalpy change of the reaction C3H6(g) + H2(g) → C3H8(g) can be calculated based on bond enthalpies

What is enthalpy change?

The term enthalpy change is defined as the heat evolved or absorbed in a reaction. The bond energies of reactants and products can be used to calculate the enthalpy change of the reaction when the substances are in the same phase.

As such, the enthalpy change for the reaction C3H6(g) + H2(g) → C3H8(g) can be calculated based on bond enthalpies and/or average bond enthalpies only.

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