This is because water has a nice correlation of units in SI. 1g water = 1 cubic cm = 1 mL, and takes 1 calorie of heat to raise by 1 degree Celsius. (all at atm

This is because water has a nice correlation of units in SI. 1g water = 1 cubic cm = 1 mL, and takes 1 calorie of heat to raise by 1 degree Celsius. (all at atmospheric pressure). See: http://www.wolframalpha.com/input/?i=one+trillionth+of+a+liter+of+water+in+grams http://www.wolframalpha.com/input/?i=one+trillionth+of+a+lit...