Explanation Write the expression for the Clapeyron equation at triple point. ( d p d T ) sat = h g − h f T ( v g − v f ) (I) Here, specific volume of saturated vapor is v g , specific volume of saturated liquid is v f , saturated temperature is T , specific enthalpy of saturated vapor is h g and specific enthalpy of saturated liquid is h f . Integrate the Equation (I) with respect to saturated temperature with the limit of initial temperature T 1 to final temperature T 2 . Δ p = ( h f − h i v f − v i ) ln ( T 2 T 1 ) (II) Here, specific volume of saturated solid water (ice) is v i , specific volume of saturated liquid water v f , specific enthalpy of saturated solid water (ice) is h i and specific enthalpy of saturated liquid water is h f , Saturated temperature of melt ice is T 1 and saturated temperature ice is T 2 . Write the expression for pressure exerted on ice by the chair and atmospheric pressure, p = p ∞ + m g A (II) Here, pressure exerted on the ice is p , atmosphere pressure is p ∞ , mass of the chair is m , acceleration due to gravity is g an area of the tips of chair legs is A Conclusion: Refer to the table A-6, “Properties of Saturated Water (Solid–Vapor): Temperature Table” to obtain the specific volume of saturated solid water (ice) as 1.091 × 10 − 3 m 3 / kg for saturated temperature of ice is − 2 ° C , specific volume of saturated liquid water as 1.0002 × 10 − 3 m 3 / kg , specific enthalpy of saturated water in wet region as 333.4 kJ / kg for saturated temperature of melt ice as 0 ° C . Substitute 333.4 kJ / kg for h i f , 1.091 × 10 − 3 m 3 / kg for v i , 1.0002 × 10 − 3 m 3 / kg for v f , 273.15 K at 0 ° C temperature for T 1 and 271.15 K at − 2 ° C temperature for T 2 in Equation (II) Δ p = [ ( 333.4 kJ / kg ) ( 1.0002 × 10 − 3 m 3 / kg ) − ( 1

Fundamentals of Engineering Thermodynamics, Binder Ready Version

8th Edition

ISBN: 9781118820445

Author: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey

Publisher: WILEY

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Chapter 11.9, Problem 39P

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The minimum area for the tips of the chair legs

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Ch. 11.9 - Prob. 1E Ch. 11.9 - Prob. 2E Ch. 11.9 - 3. What is an advantage of using the Redlich–Kwong...Ch. 11.9 - To determine the specific volume of superheated...Ch. 11.9 - Prob. 5E Ch. 11.9 - Prob. 6E Ch. 11.9 - Prob. 7E Ch. 11.9 - Prob. 8E Ch. 11.9 - Prob. 9E Ch. 11.9 - Prob. 10E

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