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The motor heat capacity of rock salt at ...

The motor heat capacity of rock salt at low temperatures varies with temperatures according to Debye's `T_(3)` law.
Thus, C = `kT^(3)/theta^(3)`, where k = 1940 J`mol^(-1)Ko^(-1)`, `theta` = 281 K)
Calculate how much heat is required to raise the temperatures of 2 moles of rock salt from 10 K to 50 K?

A

800 J

B

373 J

C

273 J

D

400 J

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The correct Answer is:
C
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