A human inhales and exhales 8 liter air over a minute. The air reaches the body temperature in the lung(36.5°C) and is saturated with water upon exhale. Calculate the mass increase of the cloth mask worn by human over one hour by assuming that the mask adsorbs the entire amount of exhaled water. The air temperature is 25°C, the pressure is 1 atm, and the relative humidity is 65%. The vapor pressure of water at 25°C is 3.165kPa and the enthalpy of vaporization is 44kJ/mol within the investigated temperature range.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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A human inhales and exhales 8 liter air over a minute. The air reaches the body temperature in the lung(36.5°C) and is saturated with water upon exhale. Calculate the mass increase of the cloth mask worn by human over one hour by assuming that the mask adsorbs the entire amount of exhaled water. The air temperature is 25°C, the pressure is 1 atm, and the relative humidity is 65%. The vapor pressure of water at 25°C is 3.165kPa and the enthalpy of vaporization is 44kJ/mol within the investigated temperature range.

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