Ch. 4 Equilibrium and Thermodynamics Flashcards
What is reversibility?
reactants are converted into products at the same time products are converted into reactants
IN a chemical reaction, the reaction rate is dependant upon?
reactant concentration.
The more product produced, the higher the decomposition rate
What is the rate equation of equilibrium?
Rate(forward) = Rate(reverse)
A reaction that is Spontaneous favors which direction?
Forward direction, making product
A reaction that is non-spontaneous favors which direction?
The reverse direction, to reactants
At equilibrium, what is ΔG
0
Keq is used to determine equilibrium constant, which is denoted as
products/reactants (coefficients are raised as powers)
When Keq favors the products
it will be a large value
Numerator greater than denominator
When Keq favors the reactants
It will be a smaller value
Denomenator larger than numerator
Which phases should not be included in the equilibrium expression?
Solids and pure liquids (water)
How would you calculate Keq for a reverse reaction?
this is the reciprocal of Keq, so 1/Keq
What are the units for Keq
moles/liter (Molarity)
Keq is negative when reactants are favored (T/F)
False.
Keq should never be negative
What is the reaction quotient?
A formula used to determine if a reaction is at equilibrium
It is also used to predict the direction in which the reaction will take to reach equilibrium
When Q < Keq
Ratio of products to reactants is lower than at equilibrium, products will want to form.
When Q >Keq
Raio of products to reactants is higher than t equilibrium, reactants will want to form.
When Q = Keq = 1
Equilibrium is reached
Calorimetry mimics which type of reaction?
combustion
1 calorie = how many Joules?
4.184