Worksheet: Heat and Heat Calculations Name___________________
KEY
1. What is the difference in temperature and heat?
2. ___
___________
__ is energy in motion. __
______________
__ is stored
energy and _
_______
_ be measured. _
_____________
_ can be measured.
3. When you heat a substance and the temperature rises, how much it rises
depends upon its ___
_________________
___.
4. The definition of specific heat capacity is the amount of _____________
required to do what?
5. You can touch the aluminum pan of a TV dinner soon after is has been taken
from the oven, but you will burn your hand if you touch the food it contains.
Explain.
6. Why doesn’t the temperature of water (for example) continually increase as it
is heated?
7. What equations must be used to calculate the heat associated with a phase
change?
Why can’t the specific heat equation be used?
Temperature is a m easure of the average kinetic energy and does not depend upon the amount of matter in the
sample. Heat is the total kinetic energ y that flows because of a difference in temperature and do es depend on
the amount of mat ter.
Kinetic Energy
cannot
specific heat capac ity
Changes in energy
heat
Potential Energy
Raise 1 gram of a substance 1OC.
The aluminum has a lower specific heat than the food (specifically the water in the food) and it
therefore heats up and cools off more quickly. A lot of hea t must be released before the water
will change its temperature even one degree.
The temperature will NOT increase during phase change s. During a phase change, the heat is
making the solid turn to liquid or the liquid turn to steam rather than increas ing the temperature.
Q = m x
Δ
Hvap or Q = m x
Δ
Hfus
Because there is no change in temperature.
