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

question 82

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 S°H ₂
• E)More information is needed to make reasonable predictions.

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