Carbon disulfide is a colorless liquid. When pure, it is nearly odorless, but the commercial product smells vile. Carbon disulfide is used in the manufacture of rayon and cellophane. The liquid burns as follows: CS (1) + 302(g) CO2(9) +2S02(g) Calculate the standard enthalpy change for this reaction using standard enthalpies of formation. AH:(CS2 (1)) = 89.70 kJ/mol AH (02(9)) = 0 kJ/mol AH;(CO2(9)) = -393.52 kJ/mol AH: (SO2(g)) =-296.8 kJ/mol Standard enthalpy change = kJ Submit Answer Try Another Version 6 item attempts remaining
Carbon disulfide is a colorless liquid. When pure, it is nearly odorless, but the commercial product smells vile. Carbon disulfide is used in the manufacture of rayon and cellophane. The liquid burns as follows: CS (1) + 302(g) CO2(9) +2S02(g) Calculate the standard enthalpy change for this reaction using standard enthalpies of formation. AH:(CS2 (1)) = 89.70 kJ/mol AH (02(9)) = 0 kJ/mol AH;(CO2(9)) = -393.52 kJ/mol AH: (SO2(g)) =-296.8 kJ/mol Standard enthalpy change = kJ Submit Answer Try Another Version 6 item attempts remaining
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Chapter6: Thermochemisty
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Problem 6.88QP: The first step in the preparation of lead from its ore (galena, PbS) consists of roasting the ore....
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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
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The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Question
Transcribed Image Text:Carbon disulfide is a colorless liquid. When pure, it is nearly odorless, but the commercial product smells vile. Carbon disulfide is used in the manufacture of rayon and cellophane. The liquid burns
as follows:
CS (1) + 302(g)→ CO2(9) +2SO2(9)
Calculate the standard enthalpy change for this reaction using standard enthalpies of formation.
AH:(CS2 (1)) = 89.70 kJ/mol
AH;(02(9)) = 0 kJ/mol
AH;(CO2(9))
= -393.52 kJ /mol
AH: (SO2(g)) =-296.8 kJ/mol
Standard enthalpy change =
kJ
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