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Table of radioactive isotopes Isotope Heat generation microwatt/kg 238 U 235 U 232Th 40K 94 570 0.9 ppm¹ 6.5 ppbe 3.4 ppmb 1.0 ppmb "Abundances expressed in mass of element per unit mass of earth Abundance (bulk earth) 0.018 ppm 0.013 ppbe 0.065 ppm¹ 0.02 ppmb 26.6 27.9 Abundance (continental crust)

Table of radioactive isotopes Isotope Heat generation microwatt/kg 238 U 235 U 232Th 40K 94 570 0.9 ppm¹ 6.5 ppbe 3.4 ppmb 1.0 ppmb "Abundances expressed in mass of element per unit mass of earth Abundance (bulk earth) 0.018 ppm 0.013 ppbe 0.065 ppm¹ 0.02 ppmb 26.6 27.9 Abundance (continental crust)

Introduction to Chemical Engineering Thermodynamics
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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From the data given in the table of radioactive isotopes below, calculate 

the total rate of heat generation in the continental crust

Table of radioactive isotopes Isotope Heat generation Abundance" microwatt/kg Abundance 0.018 ppmb 0.013 ppbº 0.065 ppm 0.02 ppm (bulk earth) (continental crust) 0.9 ppmb 6.5 ppb° 3.4 ppm 1.0 ppm 238U 235U 94 570 232 Th 26.6 40K 27.9 "Abundances expressed in mass of element per unit mass of earth ppm - parts per million "ppb - parts per billion kg. Note: The whole earth has a mass of 6 × 1024 kg; the continental crust has a mass of 2.25 × 1022
Transcribed Image Text:Table of radioactive isotopes Isotope Heat generation Abundance" microwatt/kg Abundance 0.018 ppmb 0.013 ppbº 0.065 ppm 0.02 ppm (bulk earth) (continental crust) 0.9 ppmb 6.5 ppb° 3.4 ppm 1.0 ppm 238U 235U 94 570 232 Th 26.6 40K 27.9 "Abundances expressed in mass of element per unit mass of earth ppm - parts per million "ppb - parts per billion kg. Note: The whole earth has a mass of 6 × 1024 kg; the continental crust has a mass of 2.25 × 1022
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