Test for energy content of food

Question 1

Calculation for the energy content of food

Answer 1

Energy = mass of water x temperature change x 4.2

Question 2

Source of errors

Answer 2

heat loss to surroundings and incomplete combustion of the food sample.
mistake in measuring the volume of water.

Question 3

potential hazards

Answer 3

tie long hair back
wear goggles
be careful using needles
heated water