Question 2: (Multiple Parts)

a)At 850 K, the equilibrium constant for the reaction

2 SO2(g) + O2(g) 2 SO3(g)

is Kc = 15. If the given concentrations of the three gases are mixed together at this temperature, predict in which direction the the net reaction will proceed toward equilibrium. Fill in each black with one of the following words/phrases: left, right, no net reaction

[SO2] = 0.20 M; [O2] = 0.60 M; [SO3] = 0.60 M Direction: Blank 1

[SO2] = 0.21 M; [O2] = 0.20 M; [SO3] = 0.60 M Direction: Blank 2

[SO2] = 0.60 M; [O2] = 0.70 M; [SO3] = 0.13 M Direction: Blank 3

b)The equilibrium constant for the chemical equation

N2(g) + 3 H2(g) 2 NH3(g)

is Kp = 0.0231 at 281 C. Calculate the value of Kc for the reaction at 281 C. Express your answer to the correct number of sig figs. K is unitless.

c) Write the equilibrium constant expression, Kp, for the following reaction.

3 A(g) + B(g) 2 C(g) + 2 D(g)

If the following equilibrium concentrations of reactants and products are measured, what is the value of Kp? Express your answer to the correct number of sig figs. K is unitless.

Pa = 0.345 atm; Pb = 1.11 atm; Pc = 1.08 atm; Pd = 1.23 atm

d) Write the reaction quotient, Qc, for the following reaction.

A + 3 B 2 C + D

If the following concentrations of reactants and products are measured at some time, t, what is the value of Qc? Express your answer to the correct number of sig figs. Q is unitless.

[A]t = 1.1 M; [B]t = 0.54 M; [C]t = 0.36 M; [D]t = 0.69 M