Jan '18
16
MCAT Question of the Day | MCAT Course


  • Q:

    A liquid compound, X3 undergoes two separate reactions in a lab experiment. In reaction A, the molecule first decomposes to its elemental form (simply X, which is a solid), and then heat is applied such that the X atoms reform to create X3 gas. In reaction B, heat is applied to liquid X3 and gaseous X3 is produced. Which of the following is true for these reactions?

     

    A

    Change in enthalpy for both reaction A and B is zero.

    B

    Change in enthalpy is the greater for reaction A compared with reaction B.

    C

    Change in enthalpy is the less for reaction A compared with reaction B.

    D

    Change in enthalpy is the same and nonzero for reaction A and reaction B.




    Tags: Thermochemistry | Suggest a tag
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