Answered: A sample consisting of 2.00 mol He is…

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

Section: Chapter Questions

Problem 1.1P

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1. Calculate AU, AH, q, and w for the reversible isothermal expansion of 62.4 g of Ar from a volume of 2.50 L to 15.5 L at 150.0 K. a. Treat Ar as an ideal gas. b. Treat Ar as a gas with the equation of state given below where a represents the van der Waals attraction constant. (We are ignoring the constant b in this problem.) а (P+ -)V = RT V? m т c. Explain any difference between your answers to parts a and b.
Give a specific example of a system with the energy transformation shown. In the question, W is the work done on the system, and K, U, and Eth are the kinetic, potential, and thermal energies of the system, respectively. Any energy not mentioned in the transformation is assumed to remain constant; if work is not mentioned, it is assumed to be zero. W → ΔEth
For substance A, it is known that the vapor pressure at 300K is 100kPa. It is also known that the boiling point temperature is 340K at 150 kPa. Other given information about substance A: Cpl= 200 J/mol.K and Cpv = 180 J/mol.K c) Using the correlation developed in part a), determine the latent heat of vaporization of substance A in kJ/kmol d) 2 mol of substance A goes through a process where its temperature changes from 400K to 300K at constant pressure 150kPa. i) What phase is present initially? ii) What phase is present at the final state? iii) Determine the total amount of energy transferred (in kJ) through the process and state whether the energy is transferred to or from the substance.

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A sample consisting of 2.00 mol He is expanded isothermally at 22°C from 22.8 dm3 to 31.7 dm3 (a) reversibly (b) against a constant external pressure equal to the final pressure of the gas, and (c) freely (against zero external pressure.) For the three processes, calculate q, w, ΔU and ΔH.