Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 20 - Problems: 20.29

Answer

See explanation below.

Work Step by Step

1 Ba(s) > Ca(s) > Mg(s) heavier atom has higher entropy 2 C6H14 > C6H12 > C6H6 with decreasing flexibility molar entropy decreases 3 PF2Cl3(g) > PF5(g) > PF3(g) PF5(g) > PF3(g) Molar entropy increases with increasing molecular complexity PF2Cl3(g) > PF5(g) Because Cl is heavier atom than F hence more molar entropy
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