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Question of calorific value

  • 24-09-2013 7:57pm
    #1
    Whatsernamex33
    Closed Accounts Posts: 843 ✭✭✭


    OK, everyone knows that the calorific value of hydrocarbons is obviously dependent on the length of the chain, such that the more Carbons in the chain, the more energy released with burning or combustion. This is one the reason why a cylinder of Butane is slightly more expensive than a cylinder of Propane.

    However, I am wondering, is there any difference in the calorific value between corresponding Alkanes, Alkenes and Alkynes? Such as Propane, Propene and Propyne?


Comments

  • #2
    Lbeard
    Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    Whatsernamex33 wrote: »

    However, I am wondering, is there any difference in the calorific value between corresponding Alkanes, Alkenes and Alkynes? Such as Propane, Propene and Propyne?

    Yes, they are different. Different compounds will have different amounts of energy required to hold them together. The energy difference after combustion is your heat.

    For flammables that can be used as fuels, a common measure is the BTU (The British Thermal Unit)

    Here's a good list. Propane 2,572 Btu/ft3 Propene 2,332 Btu/ft3
    http://www.engineeringtoolbox.com/heating-values-fuel-gases-d_823.html


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