1.

The molar heat capacity \[\left( {{C}_{p}} \right)\] of \[C{{D}_{2}}O\] is 10 cals at 1000 K. The change in entropy associated with cooling of 32 g of \[C{{D}_{2}}O\] vapour from 1000 K to 100 K at constant pressure will be: (D = deuterium, atomic mass = 2 u)

A. \[23.03\text{ }cal\text{ }de{{g}^{-1}}\]
B. \[-23.03\text{ }cal\text{ }de{{g}^{-1}}\]
C. \[2.303\text{ }cal\text{ }de{{g}^{-1}}\]
D. \[-2.303\text{ }cal\text{ }de{{g}^{-1}}\]
Answer» C. \[2.303\text{ }cal\text{ }de{{g}^{-1}}\]


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