Which of the following set of equations could be... | WAEC SSCE - Chemistry - 2008 (Objective)

Question 1 Report

Which of the following set of equations could be used to represent the standard enthalpy of formation of glucose?

6C _(s) + 6H _2(g) + 3O_2(g) → C ₆H₁₂O_6(s)

6CO_2(g) + 6H₂O _(l) → C₆H₁₂O_6(s) + 6O _2(g)

6C_(g) + 6H _2(g) + 3O_2(g) → C₆H₁₂O _6(s)

6C_(g) + 6H _2(g) + 3O_2(g) → C ₆H ₁₂O _6(aq)

Answer Details

The equation that could be used to represent the standard enthalpy of formation of glucose is the second option: 6CO_2(g) + 6H₂O _(l) → C₆H₁₂O_6(s) + 6O _2(g) This is because the standard enthalpy of formation of a compound is the enthalpy change that occurs when one mole of the compound is formed from its constituent elements, with all substances in their standard states. In this case, glucose is formed from carbon dioxide, water, and oxygen gas, which are the standard states of their respective elements. This equation shows the balanced chemical reaction for the formation of glucose from these elements and the resulting enthalpy change.

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Energy Changes

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Which of the following set of equations could be used to represent the standard enthalpy of formation of glucose?

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