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.
One Btu (15.0°C) is the energy required to heat 1 avoirdupois pound of liquid water from 14.5 °C to 15.5°C at a pressure of one atmosphere and equates to 1054.804 J