A database lists an equation for Û asÛ= 1.10 +0.8107+ 4.75 × 10-472where Û is in kilojoules per kilogram and T is in degrees Celsius. What are (a) thecorresponding equation for Cv and (b) the reference temperature for Û?

a. The internal energy is given by U^=1.10+0.810T+4075×10−4T2(kJ/kg).To find for the corresponding…

Answered: A database lists an equation for Û as…

Introduction to General, Organic and Biochemistry

11th Edition

ISBN:9781285869759

Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Chapter5: Gases, Liquids, And Solids

Section: Chapter Questions

Problem 5.74P

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In the 1880s, Frederick Trouton noted that the enthalpy of vaporization of 1 mol pure liquid is approximately 88 times the boiling point, Tb, of the liquid on the Kelvin scale. This relationship is called Troutons rule and is represented by the thermochemical equation liquid gas H = 88 Tb, joules Combined with an empirical formula from chemical analysis, Troutons rule can be used to find the molecular formula of a compound, as illustrated here. A compound that contains only carbon and hydrogen is 85.6% C and 14.4% H. Its enthalpy of vaporization is 389 J/g, and it boils at a temperature of 322 K. (a) What is the empirical formula of this compound? (b) Use Troutons rule to calculate the approximate enthalpy or vaporization or one mole of the compound. Combine the enthalpy of vaporization per mole with that same quantity per gram to obtain an approximate molar mass of the compound. (c) Use the results of parts (a) and (b) to find the molecular formula of this compound. Remember that the molecular mass must be exactly a whole-number multiple of the empirical formula mass, so considerable rounding may be needed.
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A database lists an equation for Û as Û= 1.10 +0.8107+ 4.75 × 10-472 where Û is in kilojoules per kilogram and T is in degrees Celsius. What are (a) the corresponding equation for Cv and (b) the reference temperature for Û?