A certain substance has an enthalpy of fusion of 5.15 kJ/mol and an entropy of fusion of 27.8 J/mol/K. Calculate the approximate melting point of the substance. Report your answer in degrees Celsius.

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Problem Statement:**

A certain substance has an enthalpy of fusion of 5.15 kJ/mol and an entropy of fusion of 27.8 J/mol/K. Calculate the approximate melting point of the substance.

Report your answer in degrees Celsius.

**Instructions:**

To find the melting point in degrees Celsius, use the formula:

\[
T = \frac{\Delta H}{\Delta S}
\]

where:
- \( T \) = melting point in Kelvin
- \( \Delta H \) = enthalpy of fusion (in J/mol)
- \( \Delta S \) = entropy of fusion (in J/mol/K)

Convert the enthalpy from kJ/mol to J/mol (1 kJ = 1000 J). 

Finally, convert the temperature from Kelvin to Celsius using the conversion:

\[
T(°C) = T(K) - 273.15
\]
Transcribed Image Text:**Problem Statement:** A certain substance has an enthalpy of fusion of 5.15 kJ/mol and an entropy of fusion of 27.8 J/mol/K. Calculate the approximate melting point of the substance. Report your answer in degrees Celsius. **Instructions:** To find the melting point in degrees Celsius, use the formula: \[ T = \frac{\Delta H}{\Delta S} \] where: - \( T \) = melting point in Kelvin - \( \Delta H \) = enthalpy of fusion (in J/mol) - \( \Delta S \) = entropy of fusion (in J/mol/K) Convert the enthalpy from kJ/mol to J/mol (1 kJ = 1000 J). Finally, convert the temperature from Kelvin to Celsius using the conversion: \[ T(°C) = T(K) - 273.15 \]
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