Consider the following system at equilibrium where AH° = 92.7 kJ, and K. = 1.80×104, at 298 K. NH,HS(s)=NH3(g) + H2S(g) When some moles of NH,HS(s) are removed from the equilibrium system at constant temperature: The value of K. The value of Qe [ |Kc- The reaction must Orun in the forward direction to restablish equilibrium. run in the reverse direction to restablish equilibrium. Oremain the same. It is already at equilibrium. The concentration of NH3 wil |

For the first one the options are increases, decreases, and remains the same.

At a certain temperature, Keq = 135.5 for the following equilibrium: SO2(g) + NO2(g) <===> NO(g) + SO3(g) Suppose a reaction vessel at this temperature contained these three gases at the following concentrations: [SO2] = 0.00250 M, [NO2] = 0.00350 M, [NO] = 0.0250 M, [SO3] = 0.0400 M.  a)Determine Qeq for the system. (b)Is the system at equilibrium? If it is not, indicate the direction toward which the system will move to reach equilibrium.

Consider the following system at equilibrium where K. = 9.52x102 and AH° = 18.8 kJ/mol at 350 K. CH4 (g) + CC14 (g) =2 CH,Ch (g) The production of CH,Cl2 (g) is favored by: Indicate True (T) or False (F) for each of the following: |1. decreasing the temperature. | 2. increasing the pressure (by changing the volume). | 3. decreasing the volume. v 4. adding CH,Cl . | 5. removing CCI4 .

4. Toluene, C;H8(1), is an important organic solvent. It is made industrially from methylcyclohexane, C,H14(g): C,H14(g) + heat ? 2C;H8(1) + 3H2(g) State three different changes to an equilibrium mixture of these reacting gases that would shift the reaction toward greater production of toluene. State and explain each change.

A chemical engineer is studying the following reaction: HCH;CO,(aq)+CH;NH,(aq) → CH;CO,(aq)+CH,NH,(aq) At the temperature the engineer picks, the equilibrium constant K, for this reaction is 0.73. The engineer charges ("fills") four reaction vessels with acetic acid and methylamine, and lets the reaction begin. He then measures the composition of the mixture inside each vessel from time to time. His first set of measurements are shown in the table below. Predict the changes in the compositions the engineer should expect next time he measures the compositions. reaction compound concentration expected change in concentration vessel HCH;CO, 1.18 M f increase I decrease (no change) CH, NH, 0.97 M f increase OI decrease O (no change) A CH,CO, 0.39 M f increase O I decrease (no change) + CH,NH, 0.39 M f increase Ot decrease (no change) HCH,CO, 1.15 M f increase OI decrease O (no change) CH,NH, 0.88 M t increase I decrease (no change) В CH,CO, 0.86 M f increase OI decrease (no change) CH,NH,…

For the following equilibrium system, K = 1.39x10-11 at 298 K. F (aq) + H₂O (1) HF (aq) + OH- (aq) Assuming that you start with just F, and that no HF or OH is initially present, which of the following best describes the equilibrium system? O The forward reaction is favored at equilibrium. O The reverse reaction is favored at equilibrium. O Appreciable quantities of all species are present at equilibrium.