Equilibrium. Chapter 15. Have you ever tried to maintain your balance as you walked across a narrow ledge? In a chemical reaction balance or equilibrium is also maintained. You can think of the yields sign as the ledge. Equilibrium.
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In a chemical reaction balance or equilibrium is also maintained.
You can think of the yields sign as the ledgeEquilibrium
Chemical reactions for the most part are reversible
You can think of the yield sign as the ledge in a chem system
Does not mean that the concentrations are not changing just that the ratio equals a definite value
Look at Habber reaction figure 15.6 text.
is also known as hydric acid, and is the major component of acid rain.
contributes to the "greenhouse effect."
may cause severe burns.
contributes to the erosion of our natural landscape.
accelerates corrosion and rusting of many metals.
may cause electrical failures and decreased effectiveness of automobile brakes.
has been found in excised tumors of terminal cancer patients.A dynamic equilibrium
aA + bB pP + qQ
equil constant Kc = [P]p [Q]q products
[A]a [Q]b reactants
Kc = [O2]3 Kc = [NOCl]2
[O3]2 [NO]2 [Cl2]
Kc = [Ag+] [Cl-]
Pure solids and liquids do not effect the equilibrium because their conc remain unchanged
Kc>>>1 larger numerator reaction goes almost totally to products – eq lies right –favors products
Kc<<<1 larger denominator
Henri-Louis Le Chatelier (1858-1936)Le Chatelier’s Principle
The eq conc’s will not be identical to the original state. However, Kc will be the same. The new equilibrium state contains a slightly higher concentration of NH3(g), and slightly lower concentration of N2(g) (as well as a slightly higher concentration of H2(g).
3.93 = [CH4] (.020)
[CH4] = (0.30)(0.10)3 3.93
Given 1.0 mol of CO2 and H20 in a 50.0 l vessel. How many moles are in an eq mix at 1000 oC Ec = 0.58 at 1000oC
CO(g) + H20(g) <-> C02(g) + H2(g
I 0.02 0.02 0 0
C -x -x +x +x
E 0.02-x 0.02-x x x
[CO] [H2O] (0.02-X)2
+,- 0.76 = X2
(the neg one gives a neg answer x can’t be neg)
H2(g) + I2(g) <-> 2HI(g)
I 1.00 2.00 0
C -x -x 2x 49.9 = (2x)2
E 1.00-x 2.00-x 2x (1.00-x)(2.00-x)