1) Ethene, C₂H₄, can be produced in the following industrial system: C₂H₆(₉) + ΔH ⇌ C₂H₄(₉) + H₂(₉) Conditions that are necessary to produce more C₂H₄ are a) low temperature and increased concentration of C₂H₄. b) low temperature and decreased concentration of H₂. c) high temperature and increased concentration of C₂H₆. d) high temperature and decreased concentration of C₂H₆. 2) Consider the following equilibrium: 2NO(₉) + Br₂(₉) + ΔH ⇌ 2NOBr(₉) The equilibrium will shift to the right if we. . . . a) remove heat. b) remove Br₂(₉) c) remove NOBr. d) remove NO. 3) Consider the following equilibrium:4NH₃(₉) + 5O₂(₉) ⇌ 4NO(₉) + 6H₂O (₉) + ΔH Which of the following will cause the equilibrium to shift to the left? a) adding H₂O(₉) b) adding NH₃ c) removing some NO(₉) d) removing H₂O(₉) 4) Energy is ______________ when bonds are broken and _____________when bonds are formed. a) released, released b) released, absorbed c) absorbed, absorbed d) absorbed, released 5) The reaction 3Fe + 4H₂O + ΔH ⇌ Fe₃O₄ + 4H₂ is: a) Exothermic b) neither c) Endothermic d) both

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