At 23.8 °C, the vapor pressure of isopropyl alcohol (rubbing alcohol) is 40. torr. At 39.5 °C, the vapor pressure is 100. torr. What is the enthalpy of vaporization for isopropyl alcohol in kJ/mol?
Added by Jennifer G.
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8 °C = 296.8 K - T2 = 39.5 °C = 312.5 K ** Show more…
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Isopropyl alcohol, $\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O},$ is marketed as "rubbing alcohol." Its vapor pressure is 100 . torr at $39.5^{\circ} \mathrm{C}$ and 400 . torr at $67.8^{\circ} \mathrm{C}$. Estimate the molar heat of vaporization of isopropyl alcohol.
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Isopropyl alcohol, $\mathrm{CH}_{3} \mathrm{CHOHCH}_{3},$ is used in rubbing alcohol mixtures. Alcohol on the skin cools by evaporation. How much heat is absorbed by the alcohol if $4.39 \mathrm{~g}$ evaporates? The heat of vaporization of isopropyl alcohol is $42.1 \mathrm{~kJ} / \mathrm{mol}$.
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