Multiple Choice
Which of the following is a false statement about the relationship between Q and K?
16. Chemical Equilibrium
Reaction Quotient
Back16. Chemical Equilibrium
Reaction Quotient
- Multiple ChoiceWhich of the following is false?
- Multiple Choice
For the reaction: 2 CO2 (g) ⇌ 2 CO (g) + 2 O2 (g), the equilibrium constant is 3.12 × 10−4 at 400 K, while the reaction quotient is 4.18 × 10−4. If initially we have 0.20 atm CO2, 0.30 atm CO and 0.15 atm O2, which of the following statements is not true?
a) The pressure of CO2 will be greater than 0.20 atm.
b) The pressure of CO will be less than 0.30 atm.
c) The pressure of O2 will be greater than 0.15 atm.
d) The pressure of O2 will be less than 0.15 atm.
e) The reaction will favor reactants.
- Multiple Choice
The equilibrium constant for the following gas phase reaction is 0.75 at 750 K. After a short time, analysis of a small amount of the reaction mixture shows the concentrations to be [NOBr] = 1.25 M, [NO] = 0.80 M and [Br2] = 0.50 M. Which of the following statements is/are true?
2 NOBr (g) ⇌ NO (g) + Br2 (g)
a) The reaction mixture is at equilibrium.
b) No further reaction will occur.
c) The partial pressure of NOBr will increase.
d) The partial pressure of NO will increase.
e) The reaction will shift to the left, the reactant side.
- Multiple ChoiceFor the reaction 2HF(g) ⇌ H2(g) + F2(g) with an equilibrium constant K = 1.00x10^-2, if 1.00 mol of HF(g), 0.291 mol of H2(g), and 0.750 mol of F2(g) are mixed in a 5.00 L flask, what is the reaction quotient, Q?
- Multiple ChoiceAmmonia can be produced via the chemical reaction N2(g) + 3H2(g) ↔ 2NH3(g). During the production process, the production engineer determines the reaction quotient to be Q = 3.56 × 10⁻⁴. If K = 6.02 × 10⁻², what can be said about the reaction?
- Multiple ChoiceHow is the reaction quotient (Q) calculated for a solubility equilibrium?