Answered: Little Johnny’s parents leave him…

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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Question

Little Johnny’s parents leave him alone with the babysitter while they go out for an amazing dinner at Ruan Thai restaurant in Wheaton, Maryland. While the babysitter listens to music by Between the Buried and Me and texts her friend, Johnny goes down to the basement and performs the thermite reaction that he read about—it was used to weld railroad ties! How cool is that?! 2 Al(s) + Fe2O3(s) à 2 Fe(s) + Al2O3(s) If he reacts 11.000 g aluminum with 19.000 g iron(III) oxide, will the iron he makes melt? (In other words, will the heat produced be sufficient to raise the temperature of the iron he makes to its melting point of 1537oC?) Assume that the iron absorbs only 60.0% of the heat produced. Assume the iron’s initial temperature is 17.22oC. The specific heatof iron is 0.450 J/goC. Do you think Johnny will get in trouble? [Hint: Find the final temperature of the iron and compare to the melting point. Hint: The masses of both reactants are given. What kind of problem will you have to do?]

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