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Chemical Equilibrium

Q. CO (g) + H2O (g) ⇌ CO2 (g) + H2 (g) 2.00 M CO and 1.00 M H2O were placed in a flask and allowed to reach equilibrium at a particular temperature where Kc = 1.56. What is the [CO] at equilibrium? a. 0.27 M b. 0.73 M c. 1.27 M d. 1.73 M e. none of the other answers

Solved • Apr 23, 2020

Chemical Equilibrium

Q. At a particular temperature, the pNe in the following reaction is 2.9 x 102 atm at equilibrium, and the moles of IF3, I2 and NeF2 are equal. What is Kp? 2 IF3 (s) + 3 Ne (g) ⇌ I2 (s) + 3 NeF2 (s) a. 2.4 x 107 b. 4.1 x 10-8 c. 3.4 x 10-3 d. 2.9 x 102 e. cannot be determined without the temperature

Solved • Apr 23, 2020

Chemical Equilibrium

Q. Once the reaction 2 A + 2 B ⇌ C + D has reached equilibrium, which of the following statements must be true? a. the forward rate constant is equal to the backward rate constant. b. Kc < 1 c. [A] = 2[C] d. Kc < 1 e. the backward reaction rate is equal to the forward reaction rate.

Solved • Apr 23, 2020

Chemical Equilibrium

Q. Consider the reaction 2 KClO3 (s) ⇌ KCl (s) + 3 O2 (g) at 500 K. At equilibrium, PO2 = 0.20 atm. What is the Kc? a. 8.0x10-3 b. 550 c. 1.2x10-7 d. 125 e. impossible to determine

Solved • Apr 23, 2020

Chemical Equilibrium

Q. In the gas phase, nitrogen dioxide is actually a mixture of nitrogen dioxide (NO2) and dinitrogen tetroxide (N2O4). If the density of such a mixture is 4.66 g/L at 74 °C and 2.50 atm, calculate the partial pressures of the gases and Kp for the dissociation of N2O4.

Solved • Apr 18, 2020

Chemical Equilibrium

Q. In an analysis of the following reaction at a certain temperature, Br2(g) + Cl2(g) ⇌ 2 BrCl(g) the equilibrium concentrations were found to be [Br2] = 4.5x10^-3 M, [Cl2] = 2.9x10^-2 M, and [BrCl] = 2.1x10^-2 M. Write the equilibrium expression, and calculate the equilibrium constant for this reaction at this temperature

Solved • Apr 18, 2020

Chemical Equilibrium

Q. A quantity of 0.29 mole of carbon dioxide was heated to a certain temperature with an excess of graphite in a closed container until the following equilibrium was reached: C(s) + CO2(g) ⇌ 2 CO(g) Under these conditions, the average molar mass of the gas was 35.0 g/mol. (a) Calculate the mole fractions of the CO and CO2. (b) What is the Kp if the total pressure is 11.2 atm?

Solved • Apr 18, 2020