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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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Similar questions

Q13. The wear resistance of a steel gear is to be improved by hardening its surface. This is to be accomplished by increasing the carbon content within an outer surface layer as a result of carbon diffusion into the steel; the carbon is to be supplied from an external carbon-rich gaseous atmosphere at an elevated and constant temperature. The initial carbon content of the steel is 0.20 wt%, whereas the surface concentration is to be maintained at 1.00 wt%. For this treatment to be effective, a carbon content of 0.60 wt% must be established at a position 0.75 mm below the surface. Specify an appropriate heat treatment in terms of temperature and time for temperatures between 900 °C and 1050 °C (you may select any 3 temperatures). For the diffusion of carbon in steel, Do = 2.3 x 10 m/s, Q = 148 kJ/mol. (The error function values are given below) erf(2) erf(z) 0.55 0.60 1.3 1.4 0.5633 0.9340 0.025 0.0282 0.6039 0.9523 0.05 0.0564 0.65 0.6420 1.5 0.9661 0.10 0.1125 0.70 0.6778 1.6 0.9763…
Produce a plot (graph) showing the shape of the PVT-surface for the ideal gas equation.
1. A layered wall consists of a copper plate with a thickness of 2.5 cm, the second layer is made of asbestos, the thickness is 3.2 mm, and the third layer is made of glass fiber with a thickness of 5 cm. The overall temperature difference of this wall is 560 ° C. a. Calculate the overall heat transfer rate on this layered wall. b. Calculate T2 and T3

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