Experiment on Which Fuels Provide the Most Heat? Comparison of the Energy Content of Fuels.

Question

Suppose you put 50 mL of water in the can instead of 100 mL and heated it 40 degrees instead of 20 degrees. In what ways, if any, would this affect the results of the experiment? What would happen if you used 200 mL of water and heated it only 10 degrees? Can you think of any advantages or disadvantages in using either 50 mL or 200 mL of water in this experiment?