Chemical equilibrium by Janasia Jones

Chemical equilibrium

janasiajones4211 — 2016-11-21 14:45:05 UTC

exists when the forward &' reverse rxns/ processes occur at exactly the same rate

Characteristics of equilibrium

janasiajones4211 — 2016-11-21 14:48:23 UTC

janasiajones4211 — 2016-11-21 14:49:15 UTC

A. Dynamic - The reaction has not stopped ; the forward and backward reactions are still occurring ( same rate)

B. Closed System -prevents exchange of matter with surroundings , so equilibrium is achieved where both reactants and products can react and recombine with each other

janasiajones4211 — 2016-11-21 14:52:50 UTC

c. Concentration- They are being produced and destroyed at an equal rate

janasiajones4211 — 2016-11-21 14:55:44 UTC

D. Macroscopic- Observable properties such as color and density; these do not change as they depend on the concentrations of the components in the mixture.

janasiajones4211 — 2016-11-21 14:57:53 UTC

E. Directional - The same equilibrium mixture will result under the same conditions , no matter whether the reaction is started with all reactants ,all products, or a mixture of both.

janasiajones4211 — 2016-11-21 15:05:03 UTC

Law of Mass Action-

janasiajones4211 — 2016-11-21 15:09:39 UTC

aA + bB <-> cC + dD at equilibrium

Equilibrium Expression- Kc or Keq . It is a measure to extent to which a reaction occurs ; it varies with temperature ( and the only with temp) and is unitless.

janasiajones4211 — 2016-11-21 15:13:05 UTC

ICE Method- The initial change in equilibrium which is used for solving equilibrium problems ( where the equilibrium concentration in unknown) is affectionately referred to as the ICE method.

janasiajones4211 — 2016-11-21 15:19:13 UTC

Le Chatelier's principle- When a change ( stress) is applied to a system at equilibrium , the system will shift its equilibrium position to counteract the effect of the disturbance.

janasiajones4211 — 2016-11-21 15:22:20 UTC

Factors Affecting Principle

janasiajones4211 — 2016-11-21 15:28:20 UTC

Concentration- if you add reactants then it will shift to the right , if you remove reactants then it will shift to the left. If you add products it will shift to the left , if you remove products they shift to the right.

janasiajones4211 — 2016-11-21 15:28:44 UTC

Temperature- As temperature goes up it shift towards the endothermic side (right) and as it goes down it shift towards the exothermic side (left)

janasiajones4211 — 2016-11-21 15:34:39 UTC

Pressure-As pressure goes down it shift towards larger numbers of moles of gas. As pressure goes down it shift towards smaller numbers of moles of gas

janasiajones4211 — 2016-11-21 15:36:16 UTC

Haber process- is the production of ammonia.

janasiajones4211 — 2016-11-21 15:40:06 UTC

Contact process - production of sulfuric acid

janasiajones4211 — 2016-11-21 15:42:07 UTC

Vapor Pressure- is the pressure exerted by the particles in the vapor phase on it's liquid at equilibrium.

janasiajones4211 — 2016-11-21 15:43:11 UTC

Strong Inter molecular Forces

janasiajones4211 — 2016-11-21 15:57:34 UTC

They have higher enthalpy of vaporization , lower vapor pressure , and higher boiling point

Weaker Inter Molecular Forces-

janasiajones4211 — 2016-11-21 16:00:09 UTC

They tend to have lower enthalpy of vaporization , higher vapor pressure, lower boiling point

Chemical Equilibrium video

janasiajones4211 — 2016-11-28 04:43:20 UTC

Characteristics of equilibrium-

janasiajones4211 — 2016-11-28 04:46:11 UTC

Vapor pressure video

janasiajones4211 — 2016-11-28 04:48:04 UTC

Haber process video

janasiajones4211 — 2016-11-28 04:49:32 UTC

Quiz

janasiajones4211 — 2016-11-28 04:50:13 UTC

1. What is chemical equilibrium ?
2. What are the characteristics of equilibrium?
3. What is the ICE method ?
4. What is the Haber process ?
5. What is the law of mass action ?
6. Describe what it is to have strong intermolecular force?
7. What is Le Chatellier's principle?
8. What are the factors that affect principle ?
9. What is the contact process?
10. Explain Vapor pressure.