Energy Sources

Question 1

How can the energy content of food be estimated?

Answer 1

By burning a sample of known mass and measuring the energy released vis calorimetry

Question 2

What does combustion of the food source cause?

Answer 2

It causes the stored energy to be released as heat, which raises the temperature of water

Question 3

What is the equation for calculating the energy content of food source vis calorimetry?

Answer 3

Energy = mass of water x 4.2 x temp increase

Question 4

What is energy measured in?

Answer 4

Joules

Question 5

What is mass of water measured in?

Answer 5

Grams

Question 6

What is temperature increase measured in?

Answer 6

Centigrade

Question 7

What is the biggest source of error in calorimetry?

Answer 7

It is usually caused by the unwanted loss of heat to the surrounding environment