The vaporization of methanol CH:OH(I) = CH3OH(g) is an endothermic process in which AHvap = 37.4 kJ/mol and in which entropy increases, ASvap = 111 J/mol·K. Calculate the boiling point of methanol (in °C) on a mountaintop where the atmospheric pressure is 385 torr. (Assume AH° and AS° do not change appreciably with temperature). 52,96 °C 1 2 3 6 C 7 8 9. +/- х 100 4.

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**The Vaporization of Methanol**

The vaporization of methanol, represented by the equation:

\[ \text{CH}_3\text{OH(l)} \rightleftharpoons \text{CH}_3\text{OH(g)} \]

is an endothermic process, characterized by the following parameters:

- **Enthalpy Change (\( \Delta H_{\text{vap}} \))**: 37.4 kJ/mol
- **Entropy Change (\( \Delta S_{\text{vap}} \))**: 111 J/mol·K

The task is to calculate the boiling point of methanol (in °C) on a mountaintop, where the atmospheric pressure is 385 torr. It's assumed that \( \Delta H^\circ \) and \( \Delta S^\circ \) do not change appreciably with temperature.

**Calculation Diagram Explanation**

The image includes a diagram of a calculator displaying the calculation:

- **Input**: Various numbers and operations are visible.
- **Result**: A result of 52.96°C is shown, but it's crossed out, indicating a correction or reconsideration of the value.

This illustration emphasizes the importance of careful calculations and re-evaluations in thermodynamic problem-solving.
Transcribed Image Text:**The Vaporization of Methanol** The vaporization of methanol, represented by the equation: \[ \text{CH}_3\text{OH(l)} \rightleftharpoons \text{CH}_3\text{OH(g)} \] is an endothermic process, characterized by the following parameters: - **Enthalpy Change (\( \Delta H_{\text{vap}} \))**: 37.4 kJ/mol - **Entropy Change (\( \Delta S_{\text{vap}} \))**: 111 J/mol·K The task is to calculate the boiling point of methanol (in °C) on a mountaintop, where the atmospheric pressure is 385 torr. It's assumed that \( \Delta H^\circ \) and \( \Delta S^\circ \) do not change appreciably with temperature. **Calculation Diagram Explanation** The image includes a diagram of a calculator displaying the calculation: - **Input**: Various numbers and operations are visible. - **Result**: A result of 52.96°C is shown, but it's crossed out, indicating a correction or reconsideration of the value. This illustration emphasizes the importance of careful calculations and re-evaluations in thermodynamic problem-solving.
The vaporization of methanol \( \text{CH}_3\text{OH(l)} \rightleftharpoons \text{CH}_3\text{OH(g)} \) is an endothermic process in which \( \Delta H_{\text{vap}} = 37.4 \, \text{kJ/mol} \) and in which entropy increases, \( \Delta S_{\text{vap}} = 111 \, \text{J/mol} \cdot \text{K} \). Calculate the boiling point of methanol (in °C) on a mountaintop where the atmospheric pressure is 385 torr. (Assume \( \Delta H^{\circ} \) and \( \Delta S^{\circ} \) do not change appreciably with temperature).

**Diagram Description:**
On the right, there is an image of a digital calculator interface with numbers and basic operations. A calculation result is shown and crossed out with a red line, displaying "5181 °C". There are no additional graphs or diagrams in the image.
Transcribed Image Text:The vaporization of methanol \( \text{CH}_3\text{OH(l)} \rightleftharpoons \text{CH}_3\text{OH(g)} \) is an endothermic process in which \( \Delta H_{\text{vap}} = 37.4 \, \text{kJ/mol} \) and in which entropy increases, \( \Delta S_{\text{vap}} = 111 \, \text{J/mol} \cdot \text{K} \). Calculate the boiling point of methanol (in °C) on a mountaintop where the atmospheric pressure is 385 torr. (Assume \( \Delta H^{\circ} \) and \( \Delta S^{\circ} \) do not change appreciably with temperature). **Diagram Description:** On the right, there is an image of a digital calculator interface with numbers and basic operations. A calculation result is shown and crossed out with a red line, displaying "5181 °C". There are no additional graphs or diagrams in the image.
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