Gce Model Questions Vol1 2017 Chemistry Question 10
Practice objective / multiple choice question 10 from the 2017 Gce Model Questions Vol1 Chemistry examination.
A hydrocarbon with formula C₅H₁₀ combusts completely in excess O₂, releasing \(-3260\) kJ mol\(^{-1}\). Its standard enthalpies of formation are \(\Delta_f H^\circ(\text{CO}_2) = -393.5\) kJ mol\(^{-1}\) and \(\Delta_f H^\circ(\text{H}_2\text{O},\ell) = -285.8\) kJ mol\(^{-1}\). (a) Calculate the standard enthalpy of formation of the hydrocarbon. (b) When the same hydrocarbon is hydrogenated under standard conditions, the enthalpy change is \(-30\) kJ mol\(^{-1}\). Based on this information, decide whether the hydrocarbon is an alkene or a cycloalkane.
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This is Gce Model Questions Vol1 2017 Chemistry Question 10. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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