Download Energy Content of Food

Energy Content of Food
In this unit you will
gain some experience
with 2 types of
calorimeters and the
PSL equipment.
Lab Directions
We will be doing 3 different labs
involving our PSL equipment.
Temperature probes
Our first lab will be an orientation lab
working with the PSL equipment and
their temperature probes, learning how
to calibrate them and take readings.
We will also practice importing our data
into Excel and graph our results.
A Calorie
A calorie is defined in the metric
system as follows:
A calorie is the amount of energy
required to raise 1 gram of water 1
degree Celsius.
Click on the
food to go to a
calorie
calculator.
Calorimeters
A calorimeter is a device used to measure
the amount of heat gained or lost in an
object.
There are 2 types of calorimeters.
1. One type is used to determine heat
exchange.
2. The other is used to determine heat
generated by chemical breakdown or
digestion.
Lab #2 Heat Exchange
Our second lab deals with calculating the
heat loss of a warm object put into cold
water.
We will track the temperature change
and graph our results.
We will also calculate the heat lost by our
metal object by calculating our heat
gained by our cold water.
A Heat Exchange
Calorimeter
Thermometer
cup
mass
water
insulation
Download Lab #2 by clicking
the link below.
Lab #3 Energy Content of Food
In this lab the students will burn a pecan.
The heat generated by the pecan will be
used to heat some cold water.
The amount of energy given off by the
pecan is absorbed by the cold water.
The students will calculate the energy lost
by calculating energy gained by the cold
water.
A Food Burning Calorimeter
thermometer
flask
t.t. clamps
soup can
Pecan
or nut
air hole
air hole
Lab #3