Potential energy 6.2 Which reaction will most favor the products at equilibrium? A Reaction coordinate Potential energy B Reaction coordinate Potential energy Reaction coordinate
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- Consider the equilibrium: (Баллов: 1) in which direction will equilibrium shift when the temperature is decreased N2O4(g) = 2 NO2(8) AH° = 58.0 kJ1.4 4 (a) Calculate the value of Kc for the reaction: PC13 (g) + Cl₂ (8) PC15 (8) Given that when 8.4 mol of PC15 (g) AH = Positive Kc = is mixed with 1.8 mol of PC13 (g) and allowed to come to equilibrium in a 10 dm³ container the amount of PC1, at equilibrium is 7.2 mol. ¹5 (g) (b) Explain the effect of the following changes below on the value of Kc: (i) Increasing temperature (ii) Lowering the concentration of chlorine (C1₂) (iii) Addition of a catalyst1.4 4 (a) Calculate the value of Kc for the reaction: PC15 (8) PC13 (g) + Cl2 (g) AH = Positive Given that when 8.4 mol of PC15 (g): is mixed with 1.8 mol of PC13 (g) and allowed to come to equilibrium in a 10 dm³ container the amount of PC15 (g) at equilibrium is 7.2 mol. Kc = (b) Explain the effect of the following changes below on the value of Kc: (i) Increasing temperature (ii) Lowering the concentration of chlorine (C1₂) (iii) Addition of a catalyst
- 5.3) write the expression for the equilibrium constant of the following reaction7 4 (a) Calculate the value of Kc for the reaction: PC15 (2) PC13 (g) + Cl2 (g) AH = Positive Given that when 8.4 mol of PCls (g) is mixed with 1.8 mol of PC13 (g) and allowed to come to equilibrium in a 10 dm³ container the amount of PCls (g) at equilibrium is 7.2 mol. Kc = (b) Explain the effect of the following changes below on the value of Kc: (1) Increasing temperature (ii) Lowering the concentration of chlorine (Cl2) (iii) Addition of a catalyst7. 2 Cro2?(aq) + 2 H* (aq) = CrO² (aq) + H2O Yellow AH° =-14 kJ/mol Orange Consider the equilibrium given above and predict the direction that the equilibrium will shift upon the (a) Addition of HCI (aq). Give reasons for your prediction. (b) Addition of NaOH(aq). Give reasons for your prediction. (c) Addition of BaCl2(aq). Give reasons for your prediction. (d) Temperature rise. Give reasons for your prediction.
- (10b) The equilibrium constant, Kc, for the following reaction is 1.29×10-2 at 600K. COCl2(g) CO(g) + Cl2(g)If an equilibrium mixture of the three gases in a 11.8 L container at 600K contains 0.303 mol of COCl2(g) and 0.320 mol of CO, the equilibrium concentration of Cl2 is M. (25a) The equilibrium constant, K, for the following reaction is 1.75×10-2 at 609 K.COCl2 (g) CO (g) + Cl2 (g) An equilibrium mixture of the three gases in a 14.0 L container at 609 K contains 0.209 M COCl2, 6.04×10-2 M CO and 6.04×10-2 M Cl2. What will be the concentrations of the three gases once equilibrium has been reestablished, if the equilibrium mixture is compressed at constant temperature to a volume of 5.82 L? [COCl2] = M [CO] = M [Cl2] = MHow will the equalibrium shift? Heat + N2 (g) + 3O2 (g) <----> 2NO (g) a) how will it shift with an addition of NH3 b) how will it shift with increase in pressure?4 (a) Calculate the value of Kc for the reaction: PCI5 (g) PC13 (g) Cl2 (g) AH = Positive Given that when 8.4 mol of PCI5 (g) is mixed with 1.8 mol of PCI3 (g) and allowed to come to equilibrium in a 10 dm³ container the amount of PCI5 (g) at equilibrium is 7.2 mol. Kc = (b) Explain the effect of the following changes below on the value of Kc: (i) Increasing temperature (ii) Lowering the concentration of chlorine (Cl2) (iii) Addition of a catalyst
- O Using the equilibrium shown below, fill in the table showing which way each stress would shift things to re-establish equilibrium and the effect on the value of Kc each stress will have. Assume that only the stress that is being applied is happening to the system at equilibrium and nothing else changes (e.g. the volume of the container remains constant unless you are told otherwise). 2CHC13(g) +Cl2(g) = 2CC14(1) + H₂(g) Stress Add Cl2(g) Add CC140 Remove CHC13(g) Cool System Add a catalyst Reduce volume Add He(g) ΔΗ = -60 kJ Direction of shift to re- establish equilibrium Change in the value of Kc od(Q97) What is the value of the equilibrium constant (Keg) for the following hypothetical reaction: 2 W (g) + X (g) 3 Y (g) Using the related hypothetical equations should be helpful: X (g) + 1/2 Y (g) W (g) + 1/2 Z (g) K = 0.211 2 Y + Z 3 X (g) K2 = 1402. Given the following equilibrium systems, determine the effect on the equilibrium when the named "stress" is applied. Normally the addition of solids or liquids to an equilibrium has no effect. a 2 NH3 (g) + 92.5 kJ 5 N2(9) + 3 H2 (9) Stress Equilibrium Shift 1 Remove N2 (9) 2 Add NH3 (9) 3 Remove H2 (9) 4 Remove NH3 (9) Add O2 (g) 6 Decrease Pressure 7 Add Heat b Ag2CO3 (s) 5 2 Ag1+ (aq) + CO32 (aq) Stress Equilibrium Shift 1 Add CO32" (aq) Remove Ag* (aq) 1+ 2 3 Add A92CO3 (s) 4 Add heat CANNOT ANSWER 5 Evapourate water off