Encyclopedic Dictionary of Polymers

2011 Edition
| Editors: Jan W. Gooch

British Thermal Unit

  • Jan W. Gooch
Reference work entry
DOI: https://doi.org/10.1007/978-1-4419-6247-8_1592

n (Btu) Before the introduction of the SI system, the Btu was variously defined as the quantity of heat required to raise the temperature of one pound (avoirdupois) of water 1°F, either at or near 39°F (the temperature of maximum density), at 50°F or 60°F, or averaged from 32 to 212°F (“mean Btu”). The Btu is defined as 1,055.056 J.

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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jan W. Gooch
    • 1
  1. 1.AtlantaUSA