Page 14 - Surviving Chemistry BFF Homework Helper and Test Prep Preview

Stored energy in substances.

Energy due to movement of particles.

A measure of the average kinetic energy of particles in

a substance

• As temperature increases, so does the average
kinetic energy (KE)

10 C 15 C 20 C
o
o
o

Lowest Temp Highest Temp

Lowest KE Highest KE

Note: The amount of a liquid does not determine its

average kinetic energy (KE)

The temperature at which most chemistry testing

and experiments are conducted. 0 C or 273 K
o

The temperature at which the solid and liquid states

are present (freezing and melting points).
For water at standard pressure (1 atm.): 0 C or 273 K
o

The temperature at which the liquid and vapor (gas)
states are present (boiling point).
o
For water at standard pressure (1 atm.): 100 C or 373 K

The temperature at which all molecular movements
stop: -273 C or 0K
o

o
Kelvin (K) and Celsius ( C) Ex: Change 85 C to K.
o

and K = 85 + 273
K = 358 K
o
K = C + 273

o
Ex: Change 230 K to C.
(Reference Table T equation)
C = 230 – 273

C = - 43 C
o
12 Copyright © 2014. E3 Scholastic Publishing. SurvivingChem.com