A Carl Hayden chemistry student conducted an experiment using a crude soda can calorimeter containing 100 g of water. The student recorded an initial water temperature of 20 ˚C. After burning a 0.4 g sample of food under the can, the student observed a maximum temperature of 40 ˚C. 

Determine the amount of energy transferred from the food sample to the water.

Given m =  100 g is the mass of water warmed up.

C = 4.18 J/g˚ , Heat capacity (C) of liquid water

change in temperature = final temperature – initial temperature

Find Q =?

Use Q=m x C x change in temperature

Plug in the values in the above equation and calculate