Consider the following reaction at equilibrium at a given temperature: 2NH3(g) + heat N2(g) + 3H2(9) Which of the following will cause the value of the equilibrium constant for this process to change? Multiple Choice Adding more NH3 to the system, with the volume held constant. Increasing the pressure by reducing the volume of the system. Adding an effective catalyst for the process. Raising the temperature of the system.

Consider the equilibrium system described by the chemical reaction below, which has a value of Kc equal to 1.2 x 104 at a certain temperature. If a solid sample of NH.SH decomposes, what will the equilibrium concentration of NH3 be? NH:SH(s) = NH3(g) + H2S(g) 1 2 3 NEXT > Based on the given values, set up ICE table in order to determine the unknown. NH.SH(s) NH:(g) H2S(g) Initial (M) Change (M) Equilibrium (M) RESET 1.2 x 104 +x +2x -2x 1.2 x 104 + x 1.2 x 104 - x 1.2 x 104 + 2x 1.2 x 104- 2x

If you decrease the volume of a system containing the following reaction at equilibrium, identify which way will the equilibrium will shift and explain why? 2NO(g) + Cl 2 (g) ↔ 2NOCl(g)

The equilibrium constant for the following reaction is 0.18 at a set temperature. Find the equilibrium concentrations if the initial concentration of PCl3 is 0.225 mol/L and the initial concentration of Cl2 is 0.150 mol/L. PCI3(g)+CI2(g)=PCI5(g)

Consider the following system at equilibrium: N₂(g) + 3H₂(g) = 2NH3(g); AH = 92.94 kJ Which of the following changes will shift the equilibrium to the right? Lincreasing the temperature II.decreasing the temperature III increasing the volume IV.decreasing the volume Vremoving some NH3 VLadding some NH3 VII removing some N₂ VIII. adding some N₂ O II, III, V, VIII O I, III, V, VII OI, VI, VIII OLIV, V, VIII O II, IV, V, VIII

Assume that the following endothermic chemical reaction is at equilibrium. C(s) + H₂O(g) + H₂(g) + CO(g) Which of the following statements is/are CORRECT? 1. Increasing the concentration of H₂(g) will cause the reaction to proceed in the backward direction, increasing the equilibrium concentration of H₂O(g). 2. Decreasing the temperature will cause the reaction to proceed in the forward direction, increasing the equilibrium concentration of CO(g). 3. Increasing the amount of C(s) will cause the reaction to proceed in the forward direction, increasing the equilibrium concentration of CO(g). All statements are correct. 2 only 3 only 1 only 1 & 2 only

For the following reaction 2 SO2(g) + O2(g)   <->   2 SO3(g)  +  heat If the equilibrium situation is stressed by increasing the volume of the container, the reaction will shift toward a No change b Right or products c Left or reactants

For the reaction at equilibrium: 2 H2O (g) +2 Cl2 (g) + energy 4 HCI (g) + O2(g), If a catalyst is added to the reaction mixture. The equilibrium will shift to the left. The equilibrium will shift to the right. The position of the equilibrium will not change.

Phosphorus pentachloride decomposes at higher temperatures. PC15 (8) PCl3(g) + Cl₂(g) An equilibrium mixture at some temperature consists of 5.81 g PCI, 208.23 g/mol 4.86 g PC3, 137.33 g/mol 3.59 g Cl₂, 70.91 g/mol in a 1.00-L flask. If you add 1.31 g of Cl₂, how will the equilibrium be affected and what will the concentration of PCI, be when equilibrium is reestablished? O shift left O shift right Ono shift will occur [PCI5] = mol/L