4) The concentration of a pure solid or a pure liquid is left out of the expression for the equilibrium constant because A) their concentrations cannot be determined. B) their activity is constant and independent of the amount of solid or liquid present. C) solids and liquids drive the reaction in an undetermined fashion. D) solids and liquids react too slowly. E) solids and liquids do not react.

= KINETICS AND EQUILIBRIUM Setting up a reaction table Suppose a 500. mL flask is filled with 1.7 mol of N₂ and 0.10 mol of NH3. This reaction becomes possible: N₂(g) + 3H₂(g)2NH, (g) Complete the table below, so that it lists the initial molarity of each compound, the change in molarity of each compound due to the reaction, and the equilibrium molarity of each compound after the reaction has come to equilibrium. Use x to stand for the unknown change in the molarity of N₂. You can leave out the M symbol for molarity. initial change equilibrium N₂ 0 0 H₂ 0 0 0 NH3 0 0 00 1/5 X

The equilibrium constant changes when...   a a catalyst is added. b the temperature changes. c the surface area changes. d the concentration of reactants changes e more than one above is correct

Explain Equilibrium criterion for a chemical reaction that takes place adiabatically?

Nitrogen and oxygen react at high temperatures. What will happen to the concentrations of at equilibrium if a catalyst is added?   Catalyst will be contaminated   Double   Nothing   Depends on the catalyst

Most medications have an expiration date. Describe with respect to equilibrium, what occurring as the medication ages. Is there any of the medication left after the expiration date?

KINETICS AND EQUILIBRIUM Using an equilibrium constant to predict the direction of... A chemical engineer is studying the following reaction: 4 HC1(g) + O₂(g) → 2 H₂O(g) + 2Cl₂(g) At the temperature the engineer picks, the equilibrium constant K for this reaction is 0.31. The engineer charges ("fills") four reaction vessels with hydrogen chloride and oxygen, and lets the reaction begin. She then measures the composition of the mixture inside each vessel from time to time. Her first set of measurements are shown in the table below. Predict the changes in the compositions the engineer should expect next time she measures the compositions. reaction vessel A B с compound HC1 0₂ H₂O Cl₂ HCI 0₂ H₂O Cl₂ HCI 0₂ H₂O C1₂ pressure 5.09 atm 5.63 atm 3.31 atm 4.48 atm 3.91 atm 5.34 atm 3.90 atm 5.07 atm 2.74 atm 5.05 atm 4.48 atm 5.65 atm expected change in pressure O ↑ increase ↑ increase O ↑ increase O ↑ increase O ↑ increase ↑ increase ↑ increase O ↑ increase ↑ increase O ↑ increase ↑ increase ↑…

Why are the terms of reactant and product arbitrary in systems that are in equilibrium?

For a given reaction, which of the following can change the magnitude of the equilibrium constant? A) changing temperature B)adding a catalyst C)removing products as they are formed D)adding a reactant E)increasing the volume of the container in a gas-phase reaction

A zero extent of reaction indicates: a. reversible reaction  b. no reaction  c.equilibrium system d. steady-state system