C C14H30 D C15H30 (Total 1 mark) 12. The correct systematic name for is A 2,3-diethylbut-2-ene B 2-ethyl-3-methylpent-2-ene 4-ethyl-3-methylpent-3-ene C D 3,4-dimethylhex-3-ene (Total 1 mark) 13. The data below refer to the industrial production of nitric acid from ammonia. 4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g) = kJ mol−1 Reaction 1 ∆H −909 Reaction 2 2NO(g) + O2(g) 2NO2(g) = kJ mol−1 ∆H −115 Reaction 3 3NO2(g) + H2O(l) 2HNO3(aq) + NO(g) = kJ mol−1 ∆H −117 Possible units for the equilibrium constant, Kc, for reaction 2 are A mol−2 m6 B mol−1 dm3 C no units D mol dm−3 (Total 1 mark) 14. Which of these substances does not show hydrogen bonding? A HF B NH3 C CH3COOH D CHF3 (Total 1 mark) 15. Hydrogen cyanide (HCN) molecules in the gas phase attract each other by:
C C14H30 D C15H30 (Total 1 mark) 12. The correct systematic name for is A 2,3-diethylbut-2-ene B 2-ethyl-3-methylpent-2-ene C 4-ethyl-3-methylpent-3-ene D 3,4-dimethylhex-3-ene (Total 1 mark) 13. The data below refer to the industrial production of nitric acid from ammonia. Reaction 1 4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g) ∆H = −909 kJ mol−1 Reaction 2 2NO(g) + O2(g) 2NO2(g) ∆H = −115 kJ mol−1 Reaction 3 3NO2(g) + H2O(l) 2HNO3(aq) + NO(g) ∆H = −117 kJ mol−1 Possible units for the equilibrium constant, Kc, for reaction 2 are A mol−2 m6 B mol−1 dm3 C no units D mol dm−3 (Total 1 mark) 14. Which of these substances does not show hydrogen bonding? A HF B NH3 C CH3COOH D CHF3 (Total 1 mark) 15. Hydrogen cyanide (HCN) molecules in the gas phase attract each other by:
a-level_paper_3_pp11.docx