why do you use water in calorimeters?
2 answers
To absorb the heat generated by the reaction being measured. You may be asking why water is used instead of some other liquid. Mostly it is because water has one of the highest heat capacities of the many liquids that could be used; therefore, it takes only a small amount of water to absorb a great deal of heat. Another reason is that water is inexpensive but that is a secondary reason.
THANK YOU SO MUCH....I have thought for days to this and it just wasn't clicking to me... thanks so much