Calculate the Standard Enthalpy Change for the Reaction
2C₈H₁₈(l) $\rarr$

question 103

Multiple Choice

Calculate the standard enthalpy change for the reaction
2C₈H₁₈(l) + 21O₂(g) $\rarr$ 8CO(g) + 8CO₂(g) + 18H₂O(l) .
Given:
2C₈H₁₈(l) + 25O₂(g) $\rarr$ 16CO₂(g) + 18H₂O(l) $\rarr$ H° = -11,020 kJ/mol
2CO(g) + O₂(g) $\rarr$ 2CO₂(g) $\Delta$ H° = -566.0 kJ/mol

• A)-1.0454 × 10⁴ kJ/mol
• B)-8,756 kJ/mol
• C)-6,492 kJ/mol
• D)1.0454 × 10⁴ kJ/mol
• E)1.1586 × 10⁴ kJ/mol

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Definitions:

RuBP Carboxylase

An enzyme that catalyzes the first major step of carbon fixation in the process of photosynthesis, converting ribulose bisphosphate (RuBP) and carbon dioxide into two molecules of 3-phosphoglycerate.

Photorespiration

A process in plant metabolism where the enzyme RuBisCO oxygenates RuBP, leading to a decrease in photosynthetic efficiency and carbon fixation.

Stomata

Small openings found on the underside of plant leaves that enable gas exchange and transpiration.

Cellular Respiration

A metabolic process in cells where nutrients are converted into energy in the form of ATP, using oxygen and releasing carbon dioxide.