You Are Given Pure Samples of Pentane, CH₃CH₂CH₂CH₂CH₃(l), and 1,3-Pentadiene

question 21

Multiple Choice

You are given pure samples of pentane, CH₃CH₂CH₂CH₂CH₃(l) , and 1,3-pentadiene, CH₂=CHCH=CHCH₃(l) . What prediction would you make concerning their standard molar entropies at 298 K?

• A) S°_pentane > S°_{1, 3-pentadiene}
• B) S°_pentane < S°_{1, 3-pentadiene}
• C) S°_pentane  S°_{1, 3-pentadiene}
• D) S°_pentane = S°_{1, 3-pentadiene} + 2
• E) More information is needed to make reasonable predictions.

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