Consider the following system at equilibrium where AH° = - 111 kJ, and Kc = 0.159, at 723 K: N₂(g) + 3H₂(g) → 2NH3(g) When 0.32 moles of NH3(g) are added to the equilibrium system at constant temperature: The value of Ke O increases Odecreases O remains the same The value of Qc O is greater than Ke O is equal to Ke O is less than Ke The reaction must O run in the forward direction to reestablish equilibrium Orun in the reverse direction to reestablish equilibrium O remain in the current position, since it is already at equilibrium The concentration of N₂ will O increase Odecrease O remain the same

Consider the following system at equilibrium where H° = -111 kJ/mol, and Kc = 0.159, at 723 K. N2(g) + 3H2(g) 2NH3(g) If the TEMPERATURE on the equilibrium system is suddenly decreased: The value of Kc fill in the blank 1 A. increases.     B. decreases.     C. remains the same.   The value of Q fill in the blank 2 A. is greater than Kc.     B. is equal to Kc.     C. is less than Kc.   The reaction must: fill in the blank 3 A. run in the forward direction to reestablish equilibrium.     B. run in the reverse direction to reestablish equilibrium.     C. remain the same. It is already at equilibrium.   The concentration of H2 will: fill in the blank 4 A. increase.     B. decrease.     C. remain the same.

Consider the following equilibrium: N2 (g)+3H2(g)2NH3 (g) AG = -34. kJ Now suppose a reaction vessel is filled with 2.15 atm of nitrogen (N2) and 2.19 atm of ammonia (NH3) at 236. °C. Answer the following questions about this system: OO rise ☐ x10 fall OO Under these conditions, will the pressure of NH3 tend to rise or fall? Is it possible to reverse this tendency by adding H₂? In other words, if you said the pressure of NH3 will tend to rise, can that be changed to a tendency to fall by adding H2? Similarly, if you said the pressure of NH3 will tend to fall, can that be changed to a tendency to rise by adding H₂? If you said the tendency can be reversed in the second question, calculate the minimum pressure of H2 needed to reverse it. Round your answer to 2 significant digits. yes no ☐ atm S

Phosphorous pentachloride decomposes according to the reaction PCl5(g)↽−−⇀PCl3(g)+Cl2(g)PCl5⁢(g)⁢↽−−⇀⁢PCl3⁢(g)+Cl2⁢(g) A 13.1 gsample of PCl5 is added to a sealed 1.25 L flask and the reaction is allowed to come to equilibrium at a constant temperature. At equilibrium, 48.4% of the PCl5 remains. What is the equilibrium constant, Kc , for the reaction?

Consider the following system at equilibrium where AH = 268 kJ and Kc = 5.10 × 10-6, at 548 K. NH4Cl(s) NH3(g) + HCl(9) The production of NH3(g) is favored by (indicate true or false): decreasing the temperature: decreasing the pressure (by changing the volume): increasing the volume: adding NH4Cl: adding HCl:

Equilibrium: 7. Write the equilibrium expression, K, for the following reactions: 2NH, (g) + CO2 (g) N,CH,0 (s) + H,0 (g) K= N2 (g) + 02 (g) 2 NO (g) K= 8. Consider the following reaction at equilibrium. 2S0, (g) 2S0, (g) + 02 (g) Predict the affect on equilibrium (will it shift left, shift right or no change?): a. Oxygen gas is removed: b. The volume is increased: c. The pressure is increased: d. SO, is added: e. SO, is added:

When heated, carbon monoxide reacts with water to produce carbon dioxide and hydrogen. CO(g) + H2O(g) <--> CO2(g) + H2(g) +heat  For each of the following changes at equilibrium, indicate whether the equilbrium shifts in the directions of the products, the reactants, or does not change: (a) decreasing the temperature (b) adding more H2(g) (c) removing some CO2(g) (d) adding more H2O(g) (e) decreasing the volume of the container

[References] Use the References to access important values if needed for this question. Consider the following system at equilibrium where AH° = 16.1 kJ, and Kc = 6.50 x 10-3, at 298 K: 2NOBr(g) 2NO(g) + Br₂(g) If the VOLUME on the equilibrium system is suddenly increased at constant temperature: The value of Ke Oincreases O decreases O remains the same The value of Qc O is greater than Ke O is equal to Ke O is less than K The reaction must run in the forward direction to reestablish equilibrium. Orun in the reverse direction to reestablish equilibrium. Oremain the same. It is already at equilibrium. The number of moles of Br2 will O increase O decrease O remain the same Show Hint F5 6 H F6 & 7 KI F7 * 8 DII F8 ( 9 DD F9 ) O F10 P F11 Previous + Next Save and Exit F12 delete

Dry ice (solid carbon dioxide) is placed in a sealed container. It sublimes to produce carbon dioxide gas and reaches equilibrium at a given temperature. If the amount of dry ice in the container is doubled, then _____________.  (After choosing the correct answer justify why in your own words why you chose that answer)                                                                                       CO2 (s) = CO2 (g) A)The amount of CO2 (g) would double.  B)The amount of CO2 (g) would increase but not double. C)The amount of CO2 (g) would not change.  D)The equilibrium amount of CO2 (s) would be less.

Consider the following system at equilibrium where H° = -108 kJ, and Kc = 77.5, at 600 K.CO(g) + Cl2(g) COCl2(g)If the VOLUME of the equilibrium system is suddenly increased at constant temperature: The value of Kc fill in the blank 1 A. increases.     B. decreases.     C. remains the same.   The value of Qc fill in the blank 2 A. is greater than Kc.     B. is equal to Kc.     C. is less than Kc.   The reaction must: fill in the blank 3 A. run in the forward direction to reestablish equilibrium.     B. run in the reverse direction to reestablish equilibrium.     C. remain the same. It is already at equilibrium.   The number of moles of Cl2 will: fill in the blank 4 A. increase.     B. decrease.     C. remain the same.