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Anonymous asked in Science & MathematicsChemistry · 1 month ago

The enthalpy of combustion (ΔH°c) of 2,3-dihydrofuran (C4H6O) ?

1. The enthalpy of combustion (ΔH°c) of 2,3-dihydrofuran (C4H6O) is -2328.51 kJ/mol. Using the appropriate information given below, calculate the enthalpy of formation (ΔH°f), in kJ/mol, for 2,3-dihydrofuran. 

Report your answer to two decimal places.

ΔH°f (CO2 (g)) = -393.51 kJ/mol

ΔH°f (H2O (l)) = -285.83 kJ/mol

2. Determine the mass (in g) of 2,3-dihydrofuran produced, if ΔH° was determined to be -27.82 kJ during an experiment in which 2,3-dihydrofuran was formed.

Report your answer to three significant figures.

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  • 1 month ago
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    C4H6O + 5 O2(g) --> 4 CO2(g) + 3 H2O(l) ΔH°c = -2328.51 kJ/mol

    ΔH°c = [4(ΔH°f CO2) + 3(ΔH°f H2O)] - ΔH°f C4H6O

    -2328.51kJ/mol = 4(-393.51 kJ/mol) + 3(-285.83) - ΔH°f C4H6O

    ΔH°f C4H6O = -103.02 kJ/mol

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