Chem 116 - General Chemistry II
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Equilibrium
Determination of Kc I
B. 3 Ag+(aq) + 6 NH3(aq) ≡ 3 Ag(NH3)2+(aq) Kc’’ =
Determination of Kc II
What is the numerical value of Kc at 40˚C?
Video Solution
Determination of the Equilibrium Partial Pressure of H2
Consider the reaction shown below:
2 C(s) + N2(g) + 5 H2(g) ≡ 2 CH3NH2(g) Kp = 3.2×10-12
If the equilibrium partial pressures of N2 and CH3NH2 are 3.6 atm and 5.4×10-6 atm, respectively, what is the equilibrium partial pressure of H2?
Which Way Will the Reaction Proceed to Reach Equilibrium?
Consider the reaction shown below.
H2(g) + I2(g) ≡ 2 HI(g) Kc = 54
If initially a container holds 0.12 M H2, 0.0010 M I2, and 0.044 M HI, which way will the reaction proceed to reach equilibrium?
Determining Equilibrium Concentration I
Consider the reaction shown below.
H2(g) + I2(g) ≡ 2 HI(g) Kc = 54
Initially a container holds only 0.12 M H2 and 0.12 M I2. What will be the equilibrium concentrations of the H2 and the HI?
Determining Equilibrium Concentration II
Consider the equilibrium shown below.
SO2Cl2(g) ≡ SO2(g) + Cl2(g); Kc = 0.078 at 375 K
What is the equilibrium concentration of SO2, if the initial concentration of SO2Cl2 is 1.0 M?
Equilibrium: Temparature & Pressure Distrubance
Consider the following reaction at equilibrium:
2 SO2(g) + O2(g) ≡ 2 SO3(g); ΔH = -158 kJ
A temperature increase will cause the reaction to proceed in (the) __________ direction; while a pressure increase due to a volume decrease will cause the reaction to proceed in (the) __________ direction to regain equilibrium.
set_10_eq_problem_1
In a study of carbon oxidation, an evacuated vessel containing a small amount of powdered graphite (a form of solid carbon) is heated to 1080 K. Gaseous CO2 is added to a pressure of 0.458 atm and CO forms. At equilibrium, the total pressure is 0.757 atm. Calculate KP.
Le Chatlier's Principle I
Consider the system below at equilibrium. What happens to the value of Q if additional Cl2 (g) is added?
PCl3 (g) + Cl2 (g) ➞ PCl5 (g)
In what direction will the system shift?
Le Chatlier's Principle II
To improve the air quality and obtain a useful product, chemists often remove sulfur from coal and natural gas by treating the contaminant hydrogen sulfide with O2 g.
2H2S (g) + O2 (g) ➞ 2S (s) + 2H2O (g)
What happens to [H2O] if O2 is added?
What happens to [H2S] if O2 is added?
What happens to [O2] if H2S is removed?
What happens to [H2S] if sulfur is added?
Le Chatlier's Principle III
Would an increase in pressure by a decreasing volume increase or decrease the yield of the following?
CaCO3 (s) ➞ CaO (s) + CO2 (g)
S (s) + 3 F2 (g) ➞ SF6 (g)