Selected Standard Heats of Formation at 25°C (298 K) Formula AHG (k]/mol) Calcium Ca(s) CaO(s) CACO,(s) Carbon -635.1 - 1206.9 C(graphite) C(diamond) CO(g) CO2(g) CH4(g) CH,OH(/) HCN(g) CS-(1) Chlorine 1.9 -110.5 -393.5 -74.9 -238.6 135 87.9 C(g) 121.0 HCI(g) Hydrogen H(g) -92.3 218.0 H2(g) Nitrogen N2(g) NH3(g) NO(g) Oxygen O;(g) Os(g) H;O(g) H,0() Silver Ag(s) ABCI(s) Sodium -45.9 90.3 143 -241.8 -285.8 - 127.0 Na(s) Na(g) NaCI(s) 107.8 -411.1 Sulfur Sg(rhombic) S,(monoclinic) SO-(g) SO,(8) 0.3 - 296.8 - 396.0
Selected Standard Heats of Formation at 25°C (298 K) Formula AHG (k]/mol) Calcium Ca(s) CaO(s) CACO,(s) Carbon -635.1 - 1206.9 C(graphite) C(diamond) CO(g) CO2(g) CH4(g) CH,OH(/) HCN(g) CS-(1) Chlorine 1.9 -110.5 -393.5 -74.9 -238.6 135 87.9 C(g) 121.0 HCI(g) Hydrogen H(g) -92.3 218.0 H2(g) Nitrogen N2(g) NH3(g) NO(g) Oxygen O;(g) Os(g) H;O(g) H,0() Silver Ag(s) ABCI(s) Sodium -45.9 90.3 143 -241.8 -285.8 - 127.0 Na(s) Na(g) NaCI(s) 107.8 -411.1 Sulfur Sg(rhombic) S,(monoclinic) SO-(g) SO,(8) 0.3 - 296.8 - 396.0
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
Related questions
Question
Calculate H0rxn for each of the following using data from Appendix B.
(a) 2 H2S(g) + 3 O2(g) 2 SO2(g) + 2 H2O(g)
(b) C2H6(g) + O2(g) CO2(g) + H2O(g) [unbalanced](kJ)

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Selected Standard Heats of
Formation at 25°C (298 K)
Formula
AH? (kJ/mol)
Calcium
Ca(s)
CaO(s)
CACO3(s)
Carbon
-635.1
- 1206.9
C(graphite)
C(diamond)
CO(g)
CO2(g)
CH4(8)
CH3OH(1)
HCN(g)
CS2()
1.9
-110.5
- 393.5
-74.9
-238.6
135
87.9
Chlorine
121.0
CI(g)
Cl2(g)
HCI(g)
Hydrogen
H(g)
H2(g)
Nitrogen
N2(g)
NH3(g)
NO(3)
Oxygen
O2(8)
O3(g)
H20(g)
H2O(1)
Silver
-92.3
218.0
-45.9
90.3
143
-241.8
- 285.8
Ag(s)
AGCI(s)
Sodium
- 127.0
Na(s)
Na(g)
NaCI(s)
Sulfur
107.8
-411.1
Sg(rhombic)
Ss(monoclinic)
SO-(g)
SO3(8)
0.3
- 296.8
- 396.0
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