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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: McGraw-Hill Education
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Question
A coal sample contains C = 90%; H = 9%; and ash = 1%. When this coal sample was tested in the laboratory for its calorific value in a bomb calorimeter, the following data were obtained:
Weight of coal burnt = 0.75g
Weight of water taken = 820g
Water equivalent of bomb calorimeter = 1500g
Temperature increase = 2.8°C
Fuse wire correction = 10 cal
Cooling correction = 0.07°C
Acid correction = 90cal
Calculate the gross and net calorific value of the coal sample in cal/g. Assume the latent heat of
condensation of steam as 580 cal/g.
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