CaO(s) + 2HCI(g) → CaCl₂(s) + H₂O(l) AS⁰ = C₂H4(g) + H₂(g) →C₂H6(g) AS⁰ = J/K J/K

Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy
Section18.4: Entropy Measurement And Values
Problem 1RC: Without looking up their standard entropies in reference tables, identify which of the following...
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CaO(s) + 2HCl(g) → CaCl₂(s) + H₂O(l)
AS° =
C₂H4(g) + H₂(g) →C₂H6(g)
AS⁰ =
J/K
J/K
Transcribed Image Text:CaO(s) + 2HCl(g) → CaCl₂(s) + H₂O(l) AS° = C₂H4(g) + H₂(g) →C₂H6(g) AS⁰ = J/K J/K
Calculate the standard entropy change, ASº, in J K-¹ for the following reactions.
Use data in the table below:
Substance
Ag(s)
AgCl(s)
Al(s)
Al₂O3(s)
C(s) (graphite)
CO(g)
CO₂(g)
CH₂(g)
CH₂Cl(g)
CH₂OH(1)
Standard Entropies of Some Typical Substances at 298.15 K
Sº
(J mol-¹ K-¹)
40
76.1
C₂H₂(g)
C₂H4(g)
C₂H6(g)
CgH 18 (1)
C₂H₂OH(1)
Ca(s)
CaCO3(s)
CaCl₂(s)
Sº
(J mol-¹ K-¹)
42.55
96.2
28.3
51.0
197.9
213.6
186.2
234.2
126.8
CO(NH2)2(s) 104.6
CO(NH2)2(aq) 173.8
200.8
219.8
229.5
466.9
161
5.69
41.4
92.9
114
Substance
CaO(s)
Ca(OH)₂ (s)
CaSO4(s)
107
CaSO4+H₂O(s) 131
CaSO4.2H₂O(s) 194.0
223.0
27
90.0
130.6
188.7
Cl₂(g)
Fe(s)
Fe₂O3(s)
H₂(g)
H₂O(g)
H₂O(1)
HCI(g)
HNO3(1)
H₂SO4(1)
HC,H,O,(0)
Hg(1)
Hg(g)
K(s)
KCI(s)
K₂SO4(s)
69.96
186.7
155.6
157
160
76.1
175
64.18
82.59
176
Substance
N₂(8)
NH3(g)
NH4Cl(s)
NO(g)
NO₂(g)
N₂O(g)
N₂O4(g)
Na(s)
Na₂CO3(s)
NaHCO3(s)
NaCl(s)
NaOH(s)
Na₂SO4(s)
02₂(8)
PbO(s)
S(s)
SO₂(g)
SO3(g)
Sº
(J mol-¹ K-¹)
191.5
192.5
94.6
210.6
240.5
220.0
304
51.0
136
102
72.38
64.18
149.4
205.0
67.8
31.9
248.5
256.2
Transcribed Image Text:Calculate the standard entropy change, ASº, in J K-¹ for the following reactions. Use data in the table below: Substance Ag(s) AgCl(s) Al(s) Al₂O3(s) C(s) (graphite) CO(g) CO₂(g) CH₂(g) CH₂Cl(g) CH₂OH(1) Standard Entropies of Some Typical Substances at 298.15 K Sº (J mol-¹ K-¹) 40 76.1 C₂H₂(g) C₂H4(g) C₂H6(g) CgH 18 (1) C₂H₂OH(1) Ca(s) CaCO3(s) CaCl₂(s) Sº (J mol-¹ K-¹) 42.55 96.2 28.3 51.0 197.9 213.6 186.2 234.2 126.8 CO(NH2)2(s) 104.6 CO(NH2)2(aq) 173.8 200.8 219.8 229.5 466.9 161 5.69 41.4 92.9 114 Substance CaO(s) Ca(OH)₂ (s) CaSO4(s) 107 CaSO4+H₂O(s) 131 CaSO4.2H₂O(s) 194.0 223.0 27 90.0 130.6 188.7 Cl₂(g) Fe(s) Fe₂O3(s) H₂(g) H₂O(g) H₂O(1) HCI(g) HNO3(1) H₂SO4(1) HC,H,O,(0) Hg(1) Hg(g) K(s) KCI(s) K₂SO4(s) 69.96 186.7 155.6 157 160 76.1 175 64.18 82.59 176 Substance N₂(8) NH3(g) NH4Cl(s) NO(g) NO₂(g) N₂O(g) N₂O4(g) Na(s) Na₂CO3(s) NaHCO3(s) NaCl(s) NaOH(s) Na₂SO4(s) 02₂(8) PbO(s) S(s) SO₂(g) SO3(g) Sº (J mol-¹ K-¹) 191.5 192.5 94.6 210.6 240.5 220.0 304 51.0 136 102 72.38 64.18 149.4 205.0 67.8 31.9 248.5 256.2
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