HW-Project-3_Carnot - RobbPage 16-April 2010 Physical...

Robb Page
16-April-2010
Physical Science 303P
Professor Law
CARNOT, HEAT AND ENERGY
1. Question:
What methodcan be used to determine the number
of calories
in one Spanish peanut?
2. Background Info:
Food
energy
3. Assumptions:
can be measured by
releasing the
1. As water absorbs heat,
its temp
stored bond energy with
heat that
rises.
is transferred to water.
One calorie
is defined as the amount
of heat
Warning! This experiment
should
needed to raise the
temperature of
not be conducted if
participants or
1g of water by 1°C. anyone in proximity has a
known
peanut allergy.
4. Hypothesis:
Calories can be determined by measuring the
mass of burnt
food, the volume of water present, and any change in
water temp.
a) cal = (vol. H
2
O) (± T H
2
O) b) cal-per-gram* = ( ∆
H
H
2
O)
(mass loss of peanut)
Note to symbols: ± T = change in temp; ∆
H
= heat gained
5. Diagram (optional):

Carnot, Heat and Energy
6. Independent Variable:
Burning of the peanut.