R
Ricky
Guest
I often get frustrated when having to do calcuations that involve imperial units, especially anything to do with specific heats. These are some of the most metric resistant values, in common usage. I never had a clue as to why the calorie, or the BTU, except that they were customary in certain parts of industry. Heck, there\'s even two calories, with a multiplier of 1,000! There\'s the calorie, and then there\'s the kilocalorie, which is mostly simply referred to a the kilocalorie.
I finally found out why these units are the size they are, and why they exist.
cwater = 1 calorie/gm °C = 4186 J/kg°C = 1 BTU/lb °F
So in SI units, the specific heat of water is 4.186 J/(g°C). This is not a nice number, because... well, water!
So, someone invented the calorie, to absorb that number leaving 1 calorie/(g°C). Well, not bad, as long as you are working with water...
But... there were people,
I finally found out why these units are the size they are, and why they exist.
cwater = 1 calorie/gm °C = 4186 J/kg°C = 1 BTU/lb °F
So in SI units, the specific heat of water is 4.186 J/(g°C). This is not a nice number, because... well, water!
So, someone invented the calorie, to absorb that number leaving 1 calorie/(g°C). Well, not bad, as long as you are working with water...
But... there were people,