Things they should know
Conduction
Convection
Radiation
Temperature – average KE. Faster moving = more KE = higher temp
What we will talk about
Specific heat
- handle on a pot…is it metal?
- put a pot on the stove with water….which gets hotter faster?
o heat capacity = amount of energy needed to raise 1°C
- “insulators” high heat capacity – not much temp change
- What other factors change temp change…
o bathtub vs coffee cup
 mass
o metal vs. water
 specific heat
- equation
o Q = mcΔt
 Q = heat
 m = mass
 C = specific heat
 Δt = tf – ti
- Used to find how hot things will get so they don’t break down
o Ex: Enzymes in body
o Ex: Water’s high heat capacity…good news for us
o Ex: radiator on a vehicle to cool engine.
 water can absorb a lot of energy
o Nuclear Plants
 water cools down reaction.
A 5.10 kg cast iron skillet is heated on a stove from
295 K – 450 K. How much heat is being transferred
to the iron?
Q = mCΔT
You will need the table in your book for this one…
What is the temperature of each of the following
substances if 8500 J of energy is added to each
one?
A) water
B) Aluminum
C) Silver
A 2350 kg granite tombstone absorbs 2.8 x 107 J of
energy form the sun to change its temperature from
5.0°C to 20.0°C. Determine the specific heat of
granite.