When 1.0 kg of ethanol at 25°C changes from the liquid to the gas phase at atmospheric pressure. The volume of that ethanol changes from 1.27 x 10-3 m³ to 1.35 m³. Given the latent heat of vaporization of ethanol is 838 J/g and atmospheric pressure P = 1.01 x 10 Pa. Find (a) the minimum amount of heat must be added to boil the ethanol. (b) the work done by the system during the vaporization process. (c) change in the internal energy of the liquid ethanol. (d) change of internal energy when the gas phase ethanol is condensed back to liquid state. Provide justification to you answer.

When 1.0 kg of ethanol at 25°C changes from the liquid to the gas phase at atmospheric pressure. The volume of that ethanol changes from 1.27 x 10-3 m³ to 1.35 m³. Given the latent heat of vaporization of ethanol is 838 J/g and atmospheric pressure P = 1.01 x 10 Pa. Find (a) the minimum amount of heat must be added to boil the ethanol. (b) the work done by the system during the vaporization process. (c) change in the internal energy of the liquid ethanol. (d) change of internal energy when the gas phase ethanol is condensed back to liquid state. Provide justification to you answer.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter21: Heat And The First Law Of Thermodynamics

Section: Chapter Questions

Problem 31PQ: Consider the latent heat of fusion and the latent heat of vaporization for H2O, 3.33 105 J/kg and...

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