Btu
One BTU is the energy required to heat 1 avoirdupois pound of liquid water by 1 degree Fahrenheit, at a pressure of one atmosphere.
One BTU is the energy required to heat 1 avoirdupois pound of liquid water by 1 degree Fahrenheit, at a pressure of one atmosphere.
The 5th International Conference on the Properties of Steam defined the International Table calorie as 4.1868 J. One Calorie (Kilogram,IT) is 1,000 times this value - 4,186.8 J