Chemical Equations and Equilibrium Constant Relationships
Properties of the Equilibrium Constant, Kc for homogeneous equilibria
In terms of Kc, write the mass action expression for each chemical reaction listed below
1). Which of the following statements is false regarding the equilibrium constant, K ?
A) K for a reaction at a particular temperature always has the same value.
B) K for the reverse reaction is the negative of K for the forward reaction.
C) The n
Use of the Integrated Rate Equations (Section 15.5)
Rate equations are differential equations that in simple cases can be easily integrated using
standard methods of calculus. For example, if the rate law has the form
the equation may be integrated (f
Collision theory - atoms, ions, and molecules must collide in order to react.
For any reaction to occur, the particles must come in contact with each other.
Only a small amount of collisions produce reactions.
Reaction Mechanism - elementary process
A mechanism for a reaction is a collection of elementary processes (also called
elementary steps or elementary reactions) that explains how the overall reaction proceeds.
A mechanism is a proposal from which you can
19-4 Criteria for Spontaneous Change:
The Second Law of Thermodynamics.
Stotal = Suniverse = Ssystem + Ssurroundings
The Second Law of Thermodynamics:
Suniverse = Ssystem + Ssurroundings > 0
All spontaneous processes produce an
increase in the entropy of
BALANCING OXIDATION-RE DUCTIDN EQUATID N5
Determine the elements changing oxidation state. This determines the compounds for each
IN ACIDIC SOLUTION: Write the oxidation and reduction half-reactions following these steps:
- balance all atom
So J K-1mol-1
c. Calculated the S total for the reaction above at STP. Is the reaction spontaneous ?
4). Free energy change from entropy and
DISCLAIMER: these notes are provided to assist you with mastering the course material but they are not intended as a replacement of the
lectures. Neither do they contain the comments and ancillary material of the lectures; they are just a set of points th
1). Molecular hydrogen can be made from methane gas by the reaction below. How is the rate of
disappearance of CH related to the rate of appearance of H ?
CH (g) + H O (l) CO (g) + 3H (g)
D) none of these
Supplemental Instruction - Chapter 14
- . ' ' . _:;~.j ,- "-:~. - "-.;:tJ .~.~: :.".
1. The rate law for the reaction, 2N0(g)
+ 02(g) -
A reaction is performed by mixing 0.020 mol o
Chem 102 Supplemental Instruction
Chemical Kinetics #2
The rate constant for the second-order reaction,
2 NOBr(g) 2 NO(g) + Br2(g) is 0.80 M-1 s-1.
(a) Starting with a concentration of 0.086 M, calculate the concentration of NOBr after 22 s.