Chemical Equilibrium

Question 1

Rate

Answer 1

Measure of the speed of any change, which occurs within an interval of time.

Question 2

Collison theory states:

Answer 2

1. Particles must collide in order to react

2. Particles lacking necessary KE to reacct will bounce apart unchanged when they collide.

Question 3

Activation Energy

Answer 3

The minimum energy that reactants need in order to react.

Question 4

Activated Complex

Answer 4

An unstable arrangement of atoms which forms momentarily.

Question 5

Diagram (Ed vs Ex) characteristic

Answer 5

En: P higher than R
Ex: R higher than P

Question 6

Catalyst

Answer 6

Lowers activation energy

Question 7

Factors that affect reaction rate (4)

Answer 7

1. Temperature - always
2. Concentration - usually
3. Surface Area - more area exposed to react
4. Catalyst - lowers AE

Question 8

Conditions necessary for equilibrium

Answer 8

1. Closed system
2. Rate of for + rev reactions are the same
3. Constant density, pressure, colour
4. Dynamic state

Question 9

When to know which is favoured (P or R)

Answer 9

Arrow side
Percentage yeild
P: greater than 50%, greater than one
R: less than 50%, less than one

Question 10

Types of Equilibrium

Answer 10

1. State
2. Solution
3. Formation

Question 11

Concentration/Temperature Change Shifts

Answer 11

Increased —> Opposite

Decreased –> Side of loss

Question 12

Pressure Change Shifts

Answer 12

Increased –> LEAST number of gas moles

Decreased –> MOST number of gas moles