A mixture of 0.0565 mol phosphorus pentachloride, PCl 5 , and 0.0800 mol helium gas, He, was placed in a 1.000-L flask and heated to 250.0°C. The phosphorus pentachloride decomposes at this temperature to give phosphorus trichloride, PCl 3 , and chlorine gas, Cl 2 . The helium gas is inert. PCl 5 ( g ) ⇌ PCl 3 ( g ) + Cl 2 ( g ) What is the partial pressure of helium in this equilibrium mixture at 250.0°C? At equilibrium, the total pressure is found to be 6.505 atm. What is K c for the dissociation of PCl 5 ?
A mixture of 0.0565 mol phosphorus pentachloride, PCl 5 , and 0.0800 mol helium gas, He, was placed in a 1.000-L flask and heated to 250.0°C. The phosphorus pentachloride decomposes at this temperature to give phosphorus trichloride, PCl 3 , and chlorine gas, Cl 2 . The helium gas is inert. PCl 5 ( g ) ⇌ PCl 3 ( g ) + Cl 2 ( g ) What is the partial pressure of helium in this equilibrium mixture at 250.0°C? At equilibrium, the total pressure is found to be 6.505 atm. What is K c for the dissociation of PCl 5 ?
Solution Summary: The author explains the equilibrium constant, which is the ratio of the rate constants of forward and reverse reactions at a given temperature.
A mixture of 0.0565 mol phosphorus pentachloride, PCl5, and 0.0800 mol helium gas, He, was placed in a 1.000-L flask and heated to 250.0°C. The phosphorus pentachloride decomposes at this temperature to give phosphorus trichloride, PCl3, and chlorine gas, Cl2. The helium gas is inert.
PCl
5
(
g
)
⇌
PCl
3
(
g
)
+
Cl
2
(
g
)
What is the partial pressure of helium in this equilibrium mixture at 250.0°C? At equilibrium, the total pressure is found to be 6.505 atm. What is Kc for the dissociation of PCl5?
11. Write the reaction for the combustion of propane gas (C3H8). If the reaction occurs in a
closed vessel (no addition or removal of reactants or products) how could the reaction be
shifted to reactants?
The Haber-Bosch process is a very important
industrial process. In the Haber-Bosch process,
hydrogen gas reacts with nitrogen gas to produce
ammonia according to the equation
3H₂(g) + N₂ (g)→2NH3(g)
The ammonia produced in the Haber-Bosch process
has a wide range of uses, from fertilizer to
pharmaceuticals. However, the production of
ammonia is difficult, resulting in lower yields than
those predicted from the chemical equation.
1.04 g H₂ is allowed to react with 10.4 g N₂, producing 2.68 g NH3.
Part A
What is the theoretical yield in grams for this reaction under the given conditions?
Express your answer to three significant figures and include the appropriate units.
► View Available Hint(s)
μÅ
Value
Units
?
Suppose a pair of chemical compounds A and B can react in two different ways:
A+B → C
Reaction 1 gives product C.
A+B → D
Reaction 2 gives product D.
The following facts are known about the two reactions:
●
Reaction 1 is endothermic and Reaction 2 is exothermic.
• If a reaction vessel is charged ("filled") with A and B, then at first C is produced faster than D.
Use these facts to sketch a qualitative reaction energy diagram for both reactions.
Note: because these sketches are only qualitative, the energies don't have to be exact. They only have to have the right relationship to each other. For exam
if one energy is less than another, that fact should be clear in your sketch.
Reaction 1
Reaction 2
energy
energy
reaction coordinate
A + B
A + B
reaction coordinate
D
Chapter 14 Solutions
OWLv2 for Ebbing/Gammon's General Chemistry, 11th Edition, [Instant Access], 1 term (6 months)
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The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY