Prefixes in the Metric System
Prefix
Abbreviation Meaning
Giga
G
109 (BILLION)
1 gigahertz
1 x 109 Hz
Mega
M
106 (MILLION)
1 megaton
1 x 106 tons
Kilo
k
103
Deci
d
(thousand)
10-1 (tenth)
1 kilogram (kg)
1 x 103 grams
Centi
cm
c
10-2
1 centimeter
1 x 10-2 meter
Nano
n
10-9 (one
1 nanometer
billionth)
1 x 10-9 meter
1 x 10-12 meter
Pico
p
10-12
Example
1 decimeter
1 x 10-1 m
Chemistry, Chapter 2, Continued
9.58 pm
•The distance between an O atom and an H
atom in a water molecule is 95.8. What is the
distance in nanometers?
•We have to convert picometers to nanometers.
•You have to convert picometers to meters to
nanometers.
•Unit Given x Unit Conversion = Answer
Given Unit
• 95. 8 x 1 x 10-12 meter = 95. 8 x 10-12 – 1 pm1 picometer
•95. 8 x 10-12 – 1 pm
- = 95.8 x 10-11 m
Example 1: Distance on the Molecular Scale
Chemistry, Chapter 2, Continued
9.58 pm
•The distance between an O atom and an H
atom in a water molecule is 95.8. What is the
distance in nanometers?
•We have to convert picometers to nanometers.
•You have to convert picometers to meters to
nanometers.
•Unit Given x Unit Conversion = Answer
Given Unit
• 95. 8 x 1 x 10-12 meter = 95. 8 x 10-12 – 1 pm1 picometer
•95. 8 x 10-12 – 1 pm- = 95.8 x 10-11 m
• 95.8 x 10-11 m
Gibbs Free Energy Equation
• The Gibbs Free Energy equation is given
by the equation:
•
•
•
•
•
... ΔG = ΔH - TΔS ...
... Where:
ΔG
= Gibbs Free Energy changeΔH
= Enthalpy changeT
= temperature ΔS
= Entropy change
NOTE: Write Δ as delta for the answers below.
•
In order to solve for the temperature, T, you must:
Step One... AddStep TwoMultiply byThe resulting
equation is:T =