Methanol can be synthesized by means of the equilibrium reaction CO(g) + 2 H2(g) 2 CH;OH(g) for which the equilibrium constant at 225°C is 6.08 × 10-3. Assume that the ratio of the pressures of CO(g) and H2(g) is 1:2. What values should they have if the partial pressure of methanol is to be 0.500 atm?

Phosphorus pentachloride decomposes to phosphorus trichloride at high temperatures as follows: PC15(g) = PC13(g) + Cl2(g) At 250\deg 0.125 M PC15 is added to the flask. If Kc = 1.80, what are the equilibrium concentrations of each gas?

Write the pressure equilibrium constant expression for this reaction. 2 H,(g)+O,(9)→2H,0(1)

For the equilibrium 2IBr( g)  ⇌  I 2( g) + Br 2( g), Keq = 8.5 x 10 -3 at 150 oC. If 0.040 atm of IBr is placed in a 1.0-L container, what is the partial pressure of this substance after equilibrium is reached?

Methanol liquid burns readily in air. One way to represent this equilibrium is: 2 CH3ОН(1) + 3 02(9)+ 2 CO2(g) + 4 H20(g) We could also write this reaction three other ways, listed below. The equilibrium constants for all of the reactions are related. Write the equilibrium constant for each new reaction in terms of K, the equilibrium constant for the reaction above. 1) CНH3ОН(1) + 3/2 02(9)+ =cO2(g) + 2 H20(g) K1 = %D 2) 2 CO2(9) + 4 H20(g) 2 CH3ОН (1) + 3 02(9) K2 = 3) СO2(g) + 2 H20(g) еснзон (1) + 3/2 02(g) K3 : %3D Drag and drop your selection from the following list to complete the answer: к1/2 1/K (1/K)!/2

At 700 K, the reaction 2SO2(g) + O2(g)    2SO3(g) has the equilibrium constant Kc = 4.3 × 106, and the following concentrations are present: [SO2] = 0.010 M; [SO3] = 10. M; [O2] = 0.010 M. Which of the following is true based on the above? a) Qc< Kc , the reaction proceeds from left to right to reach equilibrium b) Qc= Kc, the reaction is currenty at equilibrium c) Qc > Kc, the reaction proceeds from right to left to reach equilibrum d) Qc > Kc, the reaction proceeds from left to right to reach equilibrium e) Qc < Kc, the reaction proceeds from right to left to reach quilibrium

Hydrogen and fluorine react to form hydrogen fluoride, like this: H,(g)+F2(g) → 2 HF (g) The reaction is exothermic. Suppose a mixture of H,, F, and HF has come to equilibrium in a closed reaction vessel. Predict what change, if any, the perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or left. 圖 do perturbation change in composition shift in equilibrium O to the right The temperature is raised. The pressure of H2 will O to the left go up. (none) go down. not change. to the right The temperature is lowered. to the left The pressure of HF will O (none) Explanation Check O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use I Privacy Center Accessibility DII 80 F10 FB F9 F6 F7 FS F4 esc F3 F1 @ # $ dele - 7 8. 2 3 4

Phosphorus pentachloride is formed when phosphorus trichloride and chlorine react according to the following reaction. PCI3(g)+ Cl2(g) = PCl5(g) The equilibrium constant for the reaction is Kc, = 37.5 at 145 °C. If 0.222 mol of phosphorus trichloride is added to 0.750 mol of chlorine in a 1.69 - L reaction vessel and allowed to react at this temperature, what is the equilibrium concentration (in mol/L) of phosphorus pentachloride? Report your answer to THREE significant figures.

3. If the equilibrium constant K, for the reaction 2 NO (g) + O2(g) = 2 NO2 (g) is 5.0 x 1012 at a given temperature, what is the value of the equilibrium constant K, for each of the following reactions at the same temperature? a) NO (g) + ½ O2 (g) → NO2 (g) b) 2 NO2 (g) = 2 NO (g) + 02 (g) c) NO2(g) = NO (g) + ½ 02 (g)

Cyclohexane, C6H12, a hydrocarbon, can isomerize or change into methylcyclopentane, a compound of the same formula (C5 H9 CH3) but with a different molecular structure. Cyclohexane Methylcyclopentane The equilibrium constant has been estimated to be 0.12 at 25 °C. If you had originally placed 0.053 mol of cyclohexane in a 2.8 L flask, what would be the concentrations of cyclohexane and methylcyclopentane when equilibrium is established? [cyclohexane] = M [methylcyclopentane] = M