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    gaburu's Avatar
    gaburu Posts: 1, Reputation: 1
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    #1

    Apr 2, 2007, 08:31 PM
    Molar Enthalpy
    Wat is a molar enthalpy!!

    Thanks
    :D
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    Apr 3, 2007, 12:36 AM
    Enthalpy - Wikipedia, the free encyclopedia

    Molar enthalpy is just Enthalpy per mole.
    Synder222's Avatar
    Synder222 Posts: 18, Reputation: 1
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    #3

    Apr 4, 2007, 10:06 PM
    Molar enthalpy is the amount of heat needed (cooling) or given off (exothermic) during a chemical reaction.

    The question is... per mole if what? If it is obvious as to what substance in the chemical reaction you are referring to... then it is per mole of that substance. If it is not obvious, then you have to give the amount of heat (lost or gained) for each of the substances in the thermodynamic equation.
    SEJAN's Avatar
    SEJAN Posts: 1, Reputation: 1
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    #4

    Oct 14, 2008, 06:30 PM
    In thermodynamics and molecular chemistry, the enthalpy (denoted as H, h, or rarely as χ) is a quotient or description of thermodynamic potential of a system, which can be used to calculate the "useful" work obtainable from a closed thermodynamic system under constant pressure and entropy.
    This is the heat change which occurs when 1 mol of a substance reacts completely with oxygen to form products at 298 K and 1 atm. The function H was introduced by the Dutch physicist Kamerlingh Onnes in early 20th century in the following form:

    H = E + pV,

    where E represents the energy of the system. In the absence of an external field, the enthalpy may be defined, as it is generally known, by:

    H = U + pV,

    where (all units given in SI)

    * H is the enthalpy (joules)
    * U is the internal energy, (joules)
    * p is the pressure of the system, (pascals)
    * V is the volume, (cubic metres)

    hoe this helps
    (reference:Enthalpy - Wikipedia, the free encyclopedia)
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