Neco Model Questions Vol1 2019 Chemistry Question 33
Practice objective / multiple choice question 33 from the 2019 Neco Model Questions Vol1 Chemistry examination.
A 0.720 g sample of a hydrocarbon fuel is burnt completely in excess oxygen, producing 2.20 g of carbon dioxide and 1.08 g of liquid water. (a) Determine the molecular formula of the hydrocarbon. (b) Using \(\Delta H_f^\circ\) values of -393.5 kJ·mol\(^{-1}\) for CO\(_2(g)\) and -285.8 kJ·mol\(^{-1}\) for H\(_2O(l)\), calculate the heat released per gram of fuel on combustion (assume the hydrocarbon's standard enthalpy of formation is zero).
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This is Neco Model Questions Vol1 2019 Chemistry Question 33. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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