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Instead of the commonly used reaction of hydrocarbons with air as a high-performance fuel, it was suggested to use diborane with air. AH°com (B2H6(g) = -2165 kJ/mol, and AH°.com (C2H6) = -1560 kJ/mol. AS B2H6 +232 J/mol·K, AS B206 = +54 J/mol-K, AS ethane = +230 J/mol.K, AS O₂ = +205 J/mol K, AS H2O +70 J/mol·K, AS CO₂= +214 J/mol.K. a. Calculate the comparative E per gram. b. Calculate change in entropy for each reaction. c. What are practical disadvantages of using diborane?

Instead of the commonly used reaction of hydrocarbons with air as a high-performance fuel, it was suggested to use diborane with air. AH°com (B2H6(g) = -2165 kJ/mol, and AH°.com (C2H6) = -1560 kJ/mol. AS B2H6 +232 J/mol·K, AS B206 = +54 J/mol-K, AS ethane = +230 J/mol.K, AS O₂ = +205 J/mol K, AS H2O +70 J/mol·K, AS CO₂= +214 J/mol.K. a. Calculate the comparative E per gram. b. Calculate change in entropy for each reaction. c. What are practical disadvantages of using diborane?

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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Instead of the commonly used reaction of hydrocarbons with air as a high-performance fuel, it was suggested to use diborane with air. AH com(B₂H6(g)) = -2165 kJ/mol, and AH com(C₂H6) = -1560 kJ/mol. AS B₂H6 = +232 J/mol-K, AS B₂06 = +54 J/mol-K, AS ethane = +230 J/mol K, AS O₂ = +205 J/mol-K, AS H₂O = +70 J/mol-K, AS CO₂= +214 J/mol.K. a. Calculate the comparative E per gram. b. Calculate change in entropy for each reaction. C. What are practical disadvantages of using diborane?
Transcribed Image Text:Instead of the commonly used reaction of hydrocarbons with air as a high-performance fuel, it was suggested to use diborane with air. AH com(B₂H6(g)) = -2165 kJ/mol, and AH com(C₂H6) = -1560 kJ/mol. AS B₂H6 = +232 J/mol-K, AS B₂06 = +54 J/mol-K, AS ethane = +230 J/mol K, AS O₂ = +205 J/mol-K, AS H₂O = +70 J/mol-K, AS CO₂= +214 J/mol.K. a. Calculate the comparative E per gram. b. Calculate change in entropy for each reaction. C. What are practical disadvantages of using diborane?
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