Here are the essential concepts you must grasp in order to answer the question correctly.
Trouton's Rule
Trouton's Rule states that the ratio of the molar heat of vaporization (∆H<sub>vap</sub>) of a liquid to its boiling point (T<sub>bp</sub> in Kelvin) is approximately constant for many liquids, typically around 88 J/(K·mol). This empirical rule helps predict the vaporization behavior of liquids and is particularly useful in thermodynamics and physical chemistry.
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Molar Heat of Vaporization
The molar heat of vaporization is the amount of energy required to convert one mole of a liquid into vapor at its boiling point, under constant pressure. It is a crucial thermodynamic property that reflects the strength of intermolecular forces in a liquid; higher values indicate stronger forces and greater energy needed for vaporization.
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Normal Boiling Point
The normal boiling point of a liquid is the temperature at which its vapor pressure equals the atmospheric pressure (1 atm). It is a key characteristic of a substance, influencing its phase transitions and is essential for applying Trouton's Rule, as the boiling point must be expressed in Kelvin for accurate calculations.
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