APFIVE Standard Enthalpy of Formation
To determine the standard enthalpy of formation (ΔHf°) of methanol, a researcher reacts carbon monoxide gas with hydrogen gas under standard conditions. The measured enthalpy change is more exothermic than the accepted literature value for the ΔHf° of methanol. Which of the following best explains this discrepancy?
A
Neglected the standard condition of 298 K.
B
Incorrectly measured the enthalpy change of the reaction.
C
Used carbon monoxide instead of carbon in solid form.
D
Failed to account for the catalyst’s effect on ΔH.
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