Chapter 16-17 Test Flashcards
What do you choose if you see difference
Delta H
What symbolizes Delta H
If the line does not touch the to or bottom
When you see CAT (Catalyst) look for what?
Act (Activation Energy)
When you see ACT (Activation energy) look for what?
CAT (Catalyst)
If you see the word collision as an answer what do you do?
PICK IT!!!!!!!!!!!
What happens if you see an answer is Powder?
PICK IT!!!!!!!!!!!
If you see equilibrium what should you think?
Equal Rate
If the line touches the top what kind of energy is it?
Activation
If the line touches the bottom line what energy is it?
Potential Energy
The only things that can affect rate are
Temperature, Composition, Surface Area, Pressure, Nature of reactant Volume, Catalyst
Opposite affect on rate
Activation Energy and Volume
Equation for equalibrium expression
Puerto Rico
P (Product)
——————
R (Reactant)
Describe an Exothermic Graph
Starts high, goes up a bit and around a bit then falls a lot and then goes straight to the right
Describe an Endothermic Graph
Starts lower, goes up a lot and around a little then goes straight to the right
The Heat of Reaction (Delta H) is equal to the what?
Heat Content of the Products Minus the Heat Content of the reactants
If the graph gives you two numbers what do you do with them?
Subtract them
If you see increase circle what?
Increase
If you see decrease circle what?
Decrease
A(g) + B(g) —> C(g)
As the Concentration of A(g) increases the frequency of collisions of A(g) with B(g) do what
Increase
What is the Activated Complex
Goes from highest point to bottom (Must touch top and bottom)
In a gaseous system, temperature remaining constant, an increase in pressure will
Increase reaction rate
In a gaseous system, temperature remaining constant, a decrease in pressure will
Decrease reaction rate
As the surface area of the Zn(s) used in the reaction Zn(s) + 2HCl(aq) ——-> ZnCl2(aq) + H2(g), is increased, the rate of the reaction will
Increase
The addition of a catalyst to a reaction will cause a change in the
Activation Energy
Which pair of changes would indicate that a reaction is endothermic but occurs spontaneously
a Positive H and Negative G
A chemical reaction will always occur spontaneously if the reaction has a
Negative G
BaSO4(s) Equilibrium (=) Ba^2+(aq) + SO4^2-(aq)
As the concentration of the SO4^2- ions is increased, at a constant temperature the constant temperature, the concentration of Ba^2+ ions
Decreases
AgCl Equilibrium (=) Ag+(aq) + Cl-(aq) As the concentration of the Ag+ ions increased, at a constant temperature the concentration of the Cl- ions
Decrease
CH3COOH(aq) + H2O(l) Equilibrium (=) H3O+(aq) +CH3COO-(aq)
The addition of what ion will cause a decrease in the concentration of CH3COO-(aq)
H30+
N2(g)+3H^2 Equilibrium (=) 2NH^3(g) + heat
Which change favors the formation of ammonia
Increase of N2(g)
If you see the word pressure in a question what should you do?
Add the gasses
2SO^2(g) + O^2(g) Equilibrium 2SO^3(g)
As the pressure is increased at a constant temperature, the number of moles of SO^3(g) produced will
Increase
2A(g) + B(g) + 10kcal Equilibrium (=) C(g)
Which conditions would the yield the most product
High temperature and high pressure
What are the only two things that can go into a equilibrium expression?
Gases and aqueous solution
What is the equilibrium expression for the reaction
3A(g) + B(g) Equilibrium (=) 2C(g)
[C]^2
_______
[A]^3 [B]
Equilibrium Equation for
4NH^3(g) + 7O2(g) Equilibrium (=) 4NO^2(g) + 6H2O(g)
[NO^2]^4[H2O]^6
_______________
[NH^3]^4 [O^2]^7
Whats the only thing that can change the status of K
Temperature
C(s) +CO^2(g) + heat ——-> 2CO(g)
Which stress on the system would favor the production of CO(g)
Increase Pressure
If heat is on the left the reaction is
Endothermic
If heat is on the right the reaction is
Exothermic
