The enthalpy and entropy of fusion for sodium chloride are 421.5 kJ/kg and 21.98J/mol K, respectively. At a total press...

Question

Question

The enthalpy and entropy of fusion for sodium chloride are 421.5 kJ/kg and 21.98J/mol K, respectively. At a total pressure of

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Answer 1

Answer #1

$\Delta$ H⁰f = 421.5KJ/Kg = 421500J/1000g

=421.5J/g

molar mass of NaCl = 58.5g/mole

$\Delta$ H⁰f = 421.5J/g*58.5g/mole = 24657.75Jmole

$\Delta$ S⁰f = 21.98J/mole-K

$\Delta$ S⁰f = $\Delta$ H⁰f /T

T = $\Delta$ H⁰f / $\Delta$ S⁰f

= 24657.75/21.98

= 1121.8K

= 1121.8-273.15

= 848.65⁰C >>>>answer

Answer 2

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