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30.4KJ of heat is required to melt one mole of sodium chloride and the entropy change. At the melting point is 28.4 $J K^{1} m o l^{- 1}$ at 1atm. The melting point of sodium chloride. Is___K (Nearest integer)

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answer is 1070.

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Detailed Solution

$Δ S = \frac{Q_{r e v}}{T}$

$q_{r e v} = 30.4 \times 10^{3} J$

$Δ S = 28.4 J$

$T = \frac{q_{r e v}}{Δ S} = \frac{30.4 \times 10^{3}}{28.4} = 1070 K$

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