Energy Sources Flashcards
1
Q
How can the energy content of food be estimated?
A
By burning a sample of known mass and measuring the energy released vis calorimetry
2
Q
What does combustion of the food source cause?
A
It causes the stored energy to be released as heat, which raises the temperature of water
3
Q
What is the equation for calculating the energy content of food source vis calorimetry?
A
Energy = mass of water x 4.2 x temp increase
4
Q
What is energy measured in?
A
Joules
5
Q
What is mass of water measured in?
A
Grams
6
Q
What is temperature increase measured in?
A
Centigrade
7
Q
What is the biggest source of error in calorimetry?
A
It is usually caused by the unwanted loss of heat to the surrounding environment
