Gce Model Questions Vol1 2024 Chemistry Question 5
Practice objective / multiple choice question 5 from the 2024 Gce Model Questions Vol1 Chemistry examination.
The standard enthalpy of combustion of a hydrocarbon \(\mathrm{C_5H_8}\) at 298 K is -3 200 kJ mol⁻¹. The standard enthalpies of formation of \(\mathrm{CO_2(g)}\) and \(\mathrm{H_2O(l)}\) are -393.5 kJ mol⁻¹ and -285.8 kJ mol⁻¹ respectively, and that of \(\mathrm{H_2(g)}\) is 0 kJ mol⁻¹. Using these data, calculate the standard enthalpy change for the complete hydrogenation of \(\mathrm{C_5H_8}\) to the saturated alkane \(\mathrm{C_5H_{12}}\) (pentane). Give your answer in kJ mol⁻¹ (negative sign indicates exothermic).
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This is Gce Model Questions Vol1 2024 Chemistry Question 5. It is one of the objective questions from the 2024 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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