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Discussion :: Chemical Engineering Thermodynamics

  1. If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) ⇋ C₃H₈(g) will be __________ Kcal.

  2. A.

     -19.4

    B.

     -30.2

    C.

     55.2

    D.

     -55.2

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    Answer : Option A

    Explanation :

    Since the enthalpy change = enthalpy or heat content of the products – enthalpy or heat content of the reactants =−24.8+17.9−12.5=−19.4.


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