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Temperature and Keq Lesson # 11

Temperature and Keq Lesson # 11. 1. PBr 3(g) + Br 2(g) ⇋ PBr 5(g) + energy. @ 100 o C Keq = 0.17 @ 200 o C Keq = 0.091. Is the reaction endothermic or exothermic?. Temperature increased. K eq decreased. Shifted left. Exothermic.

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Temperature and Keq Lesson # 11

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  1. Temperature and Keq Lesson # 11

  2. 1. PBr3(g) + Br2(g)⇋ PBr5(g) + energy @ 100 oC Keq = 0.17 @ 200 oC Keq = 0.091 Is the reaction endothermic or exothermic? Temperatureincreased Keq decreased Shifted left Exothermic

  3. 1. The system described by the reaction below is in equilibrium. [N2O4] is increased. Describe the sequence of changes in the forward and reversereaction rates until a new equilibrium is attained. N2O4(g)⇌ 2NO2(g)

  4. 1. The system described by the reaction below is in equilibrium. [N2O4] is increased. Describe the sequence of changes in the forward and reversereaction rates until a new equilibrium is attained. N2O4(g)⇌ 2NO2(g)

  5. 1. The system described by the reaction below is in equilibrium. [N2O4] is increased. Describe the sequence of changes in the forward and reversereaction rates until a new equilibrium is attained. N2O4(g)⇌ 2NO2(g)

  6. Forward Rate Reverse Rate I increases no change C decreases increased E increases increased

  7. 2. [NO2] is decreased. Describe the sequence of changes in the forward and reverse reaction rates until a new equilibrium is attained. N2O4(g)⇌ 2NO2(g) Forward Rate Reverse Rate I no change decrease C increases decreases E decreases decreases

  8. 3. Temperature is increased. Describe the sequence of changes in the forward and reverse reaction rates until a new equilibrium is attained. Energy + N2O4(g)⇌ 2NO2(g) Forward Rate Reverse Rate I increase by more increase C increases decreases E increases increases

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