……………………………………………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………………………………………….. (Total 12 marks) 7. When ethanamide (CH3CONH2) burns in oxygen the carbon is converted into carbon dioxide, the hydrogen is converted into water and the nitrogen forms nitrogen gas. Substance ethanamide carbon water dioxide Enthalpy of formation () / kJ mol−1 −320 −394 −286 Using the data above, which one of the following is a correct value for the enthalpy of combustion of ethanamide? A kJ mol−1 −1823 B kJ mol−1 −1183 C kJ mol−1 −1000 kJ mo1−1 D −360 (Total 1 mark) 8. The correct systematic name for is A 2,3-diethylbut-2-ene B 2-ethyl-3-methylpent-2-ene C D 3,4-dimethylhex-3-ene (Total 1 mark) one of the following compounds contains the smallest percentage, by mass, of oxygen? 9. A CH3OCH2CH3 B CH3OCH2NH2 C COS D C4H9Al(OH)2 (Total 1 mark)
……………………………………………………………………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………………………………………………………………….. (Total 12 marks) 7. When ethanamide (CH3CONH2) burns in oxygen the carbon is converted into carbon dioxide, the hydrogen is converted into water and the nitrogen forms nitrogen gas. Substance ethanamide carbon dioxide water Enthalpy of formation () / kJ mol−1 −320 −394 −286 Using the data above, which one of the following is a correct value for the enthalpy of combustion of ethanamide? A −1823 kJ mol−1 B −1183 kJ mol−1 C −1000 kJ mol−1 D −360 kJ mo1−1 (Total 1 mark) 8. The correct systematic name for is A 2,3-diethylbut-2-ene B 2-ethyl-3-methylpent-2-ene C D 3,4-dimethylhex-3-ene (Total 1 mark) 9. one of the following compounds contains the smallest percentage, by mass, of oxygen? A CH3OCH2CH3 B CH3OCH2NH2 C COS D C4H9Al(OH)2 (Total 1 mark)