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  2. Gasoline gallon equivalent - Wikipedia

    en.wikipedia.org/wiki/Gasoline_gallon_equivalent

    The energy content of ethanol is 76,100 BTU/US gal (5.89 kilowatt-hours per litre), compared to 114,100 BTU/US gal (8.83 kWh/L) for gasoline. (see chart above) A flex-fuel vehicle will experience about 76% of the fuel mileage MPG when using E85 (85% ethanol) products as compared to 100% gasoline.

  3. Propane - Wikipedia

    en.wikipedia.org/wiki/Propane

    As of October 2013, the retail cost of propane was approximately $2.37 per gallon, or roughly $25.95 per 1 million BTUs. [58] This means that filling a 500-gallon propane tank, which is what households that use propane as their main source of energy usually require, cost $948 (80% of 500 gallons or 400 gallons), a 7.5% increase on the 2012 ...

  4. Energy content of biofuel - Wikipedia

    en.wikipedia.org/wiki/Energy_content_of_biofuel

    Specific energy is energy per unit mass, which is used to describe the chemical energy content of a fuel, expressed in SI units as joule per kilogram (J/kg) or equivalent units. [1] Energy density is the amount of chemical energy per unit volume of the fuel, expressed in SI units as joule per litre (J/L) or equivalent units. [2]

  5. Liquefied petroleum gas - Wikipedia

    en.wikipedia.org/wiki/Liquefied_petroleum_gas

    2 per unit of energy than does coal or oil, but more than natural gas. It emits 81% of the CO 2 per kWh produced by oil, 70% of that of coal, and less than 50% of that emitted by coal-generated electricity distributed via the grid. [40] Being a mix of propane and butane, LPG emits less carbon per joule than butane but more carbon per joule than ...

  6. Propane (data page) - Wikipedia

    en.wikipedia.org/wiki/Propane_(data_page)

    85.47 K (−187.68 °C), 0.0001 Pa Critical point: 369.522 K (96.672 °C), 42.4924 bar Std enthalpy change of fusion, Δ fus H o: 79.96 J/g Std entropy change of fusion, Δ fus S o? J/(mol·K) Std enthalpy change of vaporization, Δ vap H o: 24.545 kJ/mol Std entropy change of vaporization, Δ vap S o? J/(mol·K) Solid properties Std enthalpy ...

  7. Energy density - Wikipedia

    en.wikipedia.org/wiki/Energy_density

    Energy density differs from energy conversion efficiency (net output per input) or embodied energy (the energy output costs to provide, as harvesting, refining, distributing, and dealing with pollution all use energy). Large scale, intensive energy use impacts and is impacted by climate, waste storage, and environmental consequences.

  8. Heat of combustion - Wikipedia

    en.wikipedia.org/wiki/Heat_of_combustion

    It is measured as a unit of energy per unit mass or volume of substance. The HHV is determined by bringing all the products of combustion back to the original pre-combustion temperature, including condensing any vapor produced. Such measurements often use a standard temperature of 25 °C (77 °F; 298 K) [citation needed].

  9. Natural gas prices - Wikipedia

    en.wikipedia.org/wiki/Natural_gas_prices

    2000 - May 23, 2022 Comparison of natural gas prices in Japan, United Kingdom, and United States, 2007-2011 Natural gas prices at the Henry Hub in US Dollars per million Btu for the 2000-2010 decade. Price per million BTU of oil and natural gas in the US, 1998-2015. Natural gas prices, as with other commodity prices, are mainly driven by supply ...

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