Calculate how much energy must be transferred to vaporize 125 g benzene, C6 H6, at its boiling

Name: Problem 43, Chapter 4: Chemistry The Molecular Science
Uploaded: 2021-06-06T12:20:45-08:00
Duration: 2 min 41 s
Channel: Pronoy Sinha
Description: Calculate how much energy must be transferred to vaporize 125 g benzene, C6 H6, at its boiling point, 80.1 ^∘ C. (The enthalpy of vaporization of benzene is 30.8 kJ / mol.)

step 1 given the enthalpy of vaporization of benzene is 30 .8 kilojoude per more. The energy required t

Question

Calculate how much energy must be transferred to vaporize $125 \mathrm{~g}$ benzene, $\mathrm{C}_{6} \mathrm{H}_{6},$ at its boiling point, $80.1{ }^{\circ} \mathrm{C}$. (The enthalpy of vaporization of benzene is $30.8 \mathrm{~kJ} / \mathrm{mol}$.)

   Calculate how much energy must be transferred to vaporize $125 \mathrm{~g}$ benzene, $\mathrm{C}_{6} \mathrm{H}_{6},$ at its boiling point, $80.1{ }^{\circ} \mathrm{C}$. (The enthalpy of vaporization of benzene is $30.8 \mathrm{~kJ} / \mathrm{mol}$.)

Chemistry The Molecular Science

John W. Moore,… 5th Edition

Chapter 4, Problem 43

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Solved by Expert Pronoy Sinha

06/06/2021

Step 1

The molar mass of benzene, $\mathrm{C}_{6} \mathrm{H}_{6}$, is calculated by adding the molar masses of its constituent atoms. The molar mass of carbon (C) is 12.01 g/mol and the molar mass of hydrogen (H) is 1.008 g/mol. Therefore, the molar mass of benzene is Show more…

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Calculate how much energy must be transferred to vaporize $125 \mathrm{~g}$ benzene, $\mathrm{C}_{6} \mathrm{H}_{6},$ at its boiling point, $80.1{ }^{\circ} \mathrm{C}$. (The enthalpy of vaporization of benzene is $30.8 \mathrm{~kJ} / \mathrm{mol}$.)

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Key Concepts

Enthalpy of Vaporization

This is the amount of energy required to convert one mole of a liquid into vapor at a constant temperature and pressure. It is a crucial thermodynamic property when analyzing phase changes, particularly during boiling, and is used to determine the heat transfer involved in vaporization processes.

Mole Concept and Molar Mass

This concept involves converting the mass of a substance into moles using its molar mass. It is fundamental in stoichiometry, allowing for the calculation of the number of moles present in a given sample, which is essential for further thermodynamic and chemical calculations.

Heat Transfer in Phase Changes

This refers to the energy exchange that occurs during phase transitions, such as from liquid to gas. In such processes, the energy input is used to overcome intermolecular forces without changing the temperature, embodying the concept of latent heat.

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