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This definition ultimately became the statement that 1 IT calorie is exactly 4.1868 J. [4] [8] The Btu is then calculated from the calorie as is done for the thermochemical definitions of the BTU and the calorie, as in International standard ISO 31-4 Quantities and units—Part 4: Heat and British Standard BS 350:Part 1:1974 Conversion factors ...
BTU mean: ≈ 1.055 87 × 10 3 J: British thermal unit (thermochemical) BTU th: ≈ 1.054 350 × 10 3 J: British thermal unit (39 °F) BTU 39 °F: ≈ 1.059 67 × 10 3 J: British thermal unit (59 °F) BTU 59 °F: ≡ 1.054 804 × 10 3 J = 1.054 804 × 10 3 J: British thermal unit (60 °F) BTU 60 °F: ≈ 1.054 68 × 10 3 J: British thermal unit ...
The calorie is defined as the amount of thermal energy necessary to raise the temperature of one gram of water by 1 Celsius degree, from a temperature of 14.5 °C, at a pressure of 1 atm. For thermochemistry a calorie of 4.184 J is used, but other calories have also been defined, such as the International Steam Table calorie of 4.1868 J.
In those contexts, the unit of heat capacity is 1 BTU/°R ≈ 1900 J/K. [5] The BTU was in fact defined so that the average heat capacity of one pound of water would be 1 BTU/°F. In this regard, with respect to mass, note conversion of 1 Btu/lb⋅°R ≈ 4,187 J/kg⋅K [6] and the calorie (below).
BTUs measure just how powerful your air conditioner is. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach ...
All calories are not the same. For example, a gram of carbohydrate has 4 calories and the same goes for a gram of protein. A gram of fat provides 9 calories. Carbohydrates generally digest the ...
[1] [3] The small calorie or gram calorie is defined as the amount of heat needed to cause the same increase in one milliliter of water. [3] [4] [5] [1] Thus, 1 large calorie is equal to 1,000 small calories. A 710-millilitre (24 US fl oz) Monster energy drink with 330 large calories
The therm (symbol, thm) is a non-SI unit of heat energy equal to 100,000 British thermal units (BTU), [1] and approximately 105 megajoules, 29.3 kilowatt-hours, 25,200 kilocalories and 25.2 thermies. One therm is the energy content of approximately 100 cubic feet (2.83 cubic metres) of natural gas at standard temperature and pressure. However ...