1) Calculate the standard enthalpy changes of formation at 298 K for the stated compounds from the data supplied in each case:

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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1) Calculate the standard enthalpy changes of formation at 298 K for
the stated compounds from the data supplied in each case:
(a)
For carbon(IV) sulphide(liquid), CS2
AH (kJ mol)
298
CS2 (1) + 302(g) CO2(g) + 2SO, (g)
-1113
C(s) + 02(g) -
→ CO2 (g)
-407
S(s) + 02(g) → SO2 (g)
-298
(b)
For iron(II) chloride(solid), FeCl2
Fe(s) + 2HCI(aq)
FeCl2 (aq) + H2(g)
-88.2
FeCl2 (s) + aq –→ FeCl2 (aq)
-81.9
HCI(g)
aq HCI(aq)
-73.5
H2 (g) + Cl2 (g) – 2HCI(g)
-184.8
(c)
For lead(IV) oxide(solid), PbO2
Pb(s) +02(g) PbO(s)
3PBO(s) +02(g) → Pb3 O4 (s)
-220.1
-77.3
Pb3 04 (s) + 02(g)
3PBO2 (s)
-95.3
Transcribed Image Text:1) Calculate the standard enthalpy changes of formation at 298 K for the stated compounds from the data supplied in each case: (a) For carbon(IV) sulphide(liquid), CS2 AH (kJ mol) 298 CS2 (1) + 302(g) CO2(g) + 2SO, (g) -1113 C(s) + 02(g) - → CO2 (g) -407 S(s) + 02(g) → SO2 (g) -298 (b) For iron(II) chloride(solid), FeCl2 Fe(s) + 2HCI(aq) FeCl2 (aq) + H2(g) -88.2 FeCl2 (s) + aq –→ FeCl2 (aq) -81.9 HCI(g) aq HCI(aq) -73.5 H2 (g) + Cl2 (g) – 2HCI(g) -184.8 (c) For lead(IV) oxide(solid), PbO2 Pb(s) +02(g) PbO(s) 3PBO(s) +02(g) → Pb3 O4 (s) -220.1 -77.3 Pb3 04 (s) + 02(g) 3PBO2 (s) -95.3
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