Place the following in order of increasing entropy at 298 K. Ne Xe He Ar Kr A) He < Kr

Question

Place the following in order of increasing entropy at 298 K.
Ne Xe He Ar Kr
A) He < Kr < Ne < Ar < Xe.
B) Xe < Kr < Ar < Ne < He.
C) Ar < He < Ar < Ne < Kr.
D) Ar < Ne < Xe < Kr < He.
E) He < Ne < Ar < Kr < Xe.

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Thu Cúc 4 years 2021-08-04T01:47:49+00:00 1 Answers 177 views 0

Answers ( )

  1. huyenthanh
    0
    2021-08-04T01:49:01+00:00
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    Answer:

    E

    Explanation:

    The simple rule of thumb is that as the atomic or molar mass of an atom increases, the entropy increases. This means that more the mass more will be entropy.

    The atomic mass of various elements is as follows

    Ne = 20 g/mol

    Xe = 131 g/mol

    He = 4 g/mol

    Ar = 40 g/mol

    Kr = 84 g/mol

    Therefore, the order of increasing entropy must be

    He<Ne<Ar<Kr<Xe.

    Hence, option E is the correct answer.

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