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Question 6.10.1: Estimate cp, the molar heat capacity of the iron silicon spi...

Estimate c_p, the molar heat capacity of the iron silicon spinel, Fe_2SiO_4, at very high temperatures (> 1400 K).

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Assume that this is in the range where the Dulong and Petit law is followed. There are seven atoms in the formula unit of the spinel. Thus, by Kopp’ s rule, we estimate c_v  to be 7 × 3R = 21R = 174.6 J/mole.K; c_p  would be larger than that number.

Actual c_p  at 1400 K = 206 J/mole.K.

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