Dr FP - Basics of Physical Chemistry

Define energy

The capacity to do work

Define work

Extension of a force across a distance

What are the 4 different forms of energy?

• Mechanical

• Heat

• Electrical

• Chemical

Define SI Units

System of internationally standardised units

What are the SI Units for length?

MetreW

What are the SI Units for mass?

Kilogram

What are the SI Units for time?

Second

What are the SI units for electrical current?

Ampere

What are the SI units for temperature?

Kelvin

What are the SI units for amount of substance?

Moles

What are the SI units for luminous intensity?

Candela

Velocity equation

Velocity = distance/time

Acceleration equation

Acceleration = change in velocity/time

Force equation

Force = mass*accelaration

Energy Equation

Energy = force*distance

Power equation

Power = energy/time

Voltage equation

Voltage=power/current

Charge equation

Charge = Current*time

deci

10^-1

centi

10^-2

milli

10^-3

micro

10^-6

nano

10^-9

pico

10^-12

femto

10^-15

Atto

10^-18

deka

10

hecto

10²

kilo

10³

mega

10^6

giga

10^9

tera

10^12

peta

10^15

exa

10^18

Energy equation using planks law

Colours at different wavelengths

The three different movements of atoms

• Translation

• Rotation

• Viabration

How many possible rotations are there for a linear molecule?

2

How many possible rotations are there for non linear molecules?

3

Equation to calculate number of vibrations in linear molecules

3n-5

Equation to calculate number of vibrations in non linear molecules

3n-6