Some useful conversions for thinking about Atomic Hydrogen equivalences:

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109,000 cal./gram mole = 432.6 BTU/gram mole

109,000 cal./second = 432.6 BTU/second

432.6 BTU/second = 456,011.2 watts

432.6 BTU/second = 611.5 horsepower

1 Btu = 252.05597496 gram calories
1 Btu = 252.16441205 calories [thermochemical]

Energy Conversions: http://www.asknumbers.com/EnergyWorkConversion.aspx

Energy units: Quantities
* 1.0 joule (J) = one Newton applied over a distance of one meter (= 1 kg m2/s2).
* 1.0 joule = 0.239 calories (cal)
* 1.0 calorie = 4.187 J
* 1.0 gigajoule (GJ) = 109 joules
    = 0.948 million Btu
    = 239 million calories
    = 278 kWh
* 1.0 British thermal unit (BTU) = 1055 joules (1.055 kJ)
    = 251.99569 calories
* 1 calorie = 0.00396 BTU [thermochemical]
* 1 calorie = 0.00396 BTU
* 432 BTU = 0.12660 kilowatt hour
    = 126.60670 watt hour
    = 455784.12833 watt seconds
    = 455784.1283 joules
    = 0.16978 horsepower hour
    = 4557841283334.35 erg
    = 108935.02111 calorie (cal.)
    = 108.93502 kilocalorie (k.cal.)
* 1.0 Quad = One quadrillion BTU (115 BTU)
    = 1.055 exajoules (EJ), or approximately 172 million barrels of oil equivalent (boe)
* 1000 BTU/lb = 2.33 gigajoules per tonne (GJ/t)
* 1000 BTU/US gallon = 0.279 megajoules per liter (MJ/l)
       
Power
* 1.0 watt = 1.0 joule/second
    = 3.413 BTU/hr
* 1.0 kilowatt (kW) = 3413 BTU/hr
    = 1.341 horsepower
* 1.0 kilowatt-hour (kWh) = 3.6 MJ
    = 3413 BTU
* 1.0 horsepower (hp) = 550 foot-pounds per second
    = 2545 BTU per hour
    = 745.7 watts
    = 0.746 kW
       
Electricity:
* 1 KW = 3,413 BTU/hr
       
Natural gas:
* 1 Cubic Foot of Natural Gas = 1030 BTU's
* 1 CCF = 100 Cu Ft = 1 Therm = 103,000 BTU's
       
* 1 MCF = 1,000 Cu Ft = 10 Therms
    = 1,034,000 BTU's
    = 1.034 MMBTU's
       
Propane:
* 1 Gal Propane = 91,600 BTU's
* 1 Cu Ft Propane = 2,500 BTU's
       
Gasoline:
* 1 Gal Gasoline (mid grade) = 125,000 BTU's
       
Ethanol:
* 1 Gal Ethanol = 76,000 BTU's
       
Fuel Oil:
* 1 Gal of #2 Fuel Oil = 139,000 BTU's
* 1 Gal of #4 Fuel Oil   145,000 BTU's
* 1 Gal of #6 Fuel Oil   150,000 BTU's
       
 
* 1 Barrel of Oil = 42 Gallons
* 1 Btu = 252 calories
* 1 Btu = .293 watt
* 1 ton of refrigeration = 12,000 BTU/hr
* 1lb coal = 12,000 BTU
* 1lb wood = 3,500 BTU
       
* 1hp = 746 watts
    = 33, 479 BTU/hr (boiler)
    = 33,000 foot-lbs./min
    = 42,440 BTU/min
* 1 watt = 3.412 BTU
* 1 kilowatt = 1,000 watts
* 1 kilowatt = 1.341 horsepower
* 1000 kilowatts = 1 Megawatt