Group Assignment-4 Chemistry 1110 1. Methanol, CH3OH, is prepared industrially from the following reaction: ΔΗΡ-21.7 Kj Predict the direction of the reaction for the following and EXPLAIN WHY a. Hydrogen gas is added to the equilibrium mixture. b. Carbon monoxide is removed from the equilibrium mixture. c. The pressure is increased. d. The temperature is increased. e. A catalyst is added. f. Methanol is removed from the equilibrium mixture. 2. The reaction: 2 NO(g) +2 H2(g) -N2 +2 H20(g) was studied at 1100K and the following data was collected. Initial Rate, mol/L-min 3.0 x 10-3 9.0 x 10-3 3.6 x 10-2 a. What is the order with respect to NO? with respect to H2? 5.00x10-3 15.0x10-3 15.0x10-3 2.50x103 2.50x103 10.0x103 2 3 b. Determine the overall order of the reaction. C. Write the rate law. 3. State Le Chatelier's Principle and how you will test it in next week's experiment. Is the lab qualitative or quantitative? Explain

Consider the following system at equilibrium where H° = -18.8 kJ, and Kc = 10.5, at 350 K:2CH2Cl2(g) CH4(g) + CCl4(g)If the TEMPERATURE on the equilibrium system is suddenly increased: 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 restablish equilibrium.     B. Run in the reverse direction to restablish equilibrium.     C. Remain the same. Already at equilibrium.   The concentration of CCl4 will: fill in the blank 4 A. Increase.     B. Decrease.     C. Remain the same.

The decomposition of PCl5 occurs by the equilibrium process          PCl5(g) = PCl3(g) + Cl2(g)             DH, = 92.5 kJ mol–1   If the reaction is initially at equilibrium, explain what happens when the temperature is lowered. Select one: a. The equilibrium shifts left b. The concentration of Cl2(g) will increase c. No change d. The equilibrium shifts right

For the following reaction, which of changes listed below would cause more reactants to form when equilibrium is re- established? 2NO(g) + Cl₂(g) 2NOCI(g) + 75 kJ a. Add a catalyst. b. Increase the volume. C. Increase the temperature. d. Decrease the [NO] e. Increase the pressure.