Useful info 1 bar = 10° Pa 1 atm = 1.013bar R = 8.314 J/K-mol NA = 6.022x1023 mol = 8.206x10 L-atm/K-mol 3 = 8.206x10° m²-atm/K-mol 8 = 9.807 m/s? Pm[H2O] = 1.00 g/mL = 760 Torr = 62.36 L-Torr/K-mol 1 mbar = 10 bar 1J = 10² L-bar = 9.870×10³ L-atm= 0.2390 cal = 10² cm= 10° mm= 10° µm = 10° nm=101º A 1J = 1 Pa-m³ 1 L-atm = 101.3 J 1 m³ = 10³ L = 106 cm³ At 298 K (only): %3D RT = 2.478 kJ/mol (= 24.46 L-atm/mol) Physical Properties of Selected Substances mol. wt. ΔΗ Sm J/(mol·K) J/(mol·K) Cp,m AHus melting temp AHap boiling temp kJ/mol g/mol 39.9 kJ/mol K kJ/mol K 154.84 Ar(g) C(s,grpht.) CH;OH(1) CH;OH(g) CH4(g) CO(g) CO,(g) H,(g) H,O(1) H,O(g) NH;(g) O2(g) Properties of pure phases are for standard conditions of 298 K and 1 atm. Phase transition enthalpies are valid at the indicated phase transition temperature, at 1 atm. 20.786 12.01 8.53 32.04 -238.66 81.6 3.16 175.2 35.29 337.2 32.04 -200.66 43.9 16.04 -74.8 35.3 0.94 91 8.2 112 28.0 -110.53 29.14 44.0 -393.5 213.74 37.11 2.0 116.1 28.8 18.0 -285.8 69.9 75.3 6.0 273 40.6 373 18.0 -241.8 188.8 33.6 18.0 -46.1 192.4 35.1 5.7 195 23.3 240 32.0 205.1 29.4 Integrals Equations of state xn+1 x" dx ;n + -1 RT a ; van der Waals V2 n + 1 Vm In x В RT 1 + Vm + ... ; virial Vm 1 dx 1 - In (аx — b) ax a Nomenclature – but, when in doubt, write it out! AH Change in enthalpy for an arbitrary process (units of energy) AHm Change in enthalpy for an arbitrary process, per mole (energy/mole) AH, or AHn Standard molar enthalpy of reaction, per mole, between separated products and reactants, each in the standard states for the phases specified and at the specified temperature. (energy/mole) rxn 10
Useful info 1 bar = 10° Pa 1 atm = 1.013bar R = 8.314 J/K-mol NA = 6.022x1023 mol = 8.206x10 L-atm/K-mol 3 = 8.206x10° m²-atm/K-mol 8 = 9.807 m/s? Pm[H2O] = 1.00 g/mL = 760 Torr = 62.36 L-Torr/K-mol 1 mbar = 10 bar 1J = 10² L-bar = 9.870×10³ L-atm= 0.2390 cal = 10² cm= 10° mm= 10° µm = 10° nm=101º A 1J = 1 Pa-m³ 1 L-atm = 101.3 J 1 m³ = 10³ L = 106 cm³ At 298 K (only): %3D RT = 2.478 kJ/mol (= 24.46 L-atm/mol) Physical Properties of Selected Substances mol. wt. ΔΗ Sm J/(mol·K) J/(mol·K) Cp,m AHus melting temp AHap boiling temp kJ/mol g/mol 39.9 kJ/mol K kJ/mol K 154.84 Ar(g) C(s,grpht.) CH;OH(1) CH;OH(g) CH4(g) CO(g) CO,(g) H,(g) H,O(1) H,O(g) NH;(g) O2(g) Properties of pure phases are for standard conditions of 298 K and 1 atm. Phase transition enthalpies are valid at the indicated phase transition temperature, at 1 atm. 20.786 12.01 8.53 32.04 -238.66 81.6 3.16 175.2 35.29 337.2 32.04 -200.66 43.9 16.04 -74.8 35.3 0.94 91 8.2 112 28.0 -110.53 29.14 44.0 -393.5 213.74 37.11 2.0 116.1 28.8 18.0 -285.8 69.9 75.3 6.0 273 40.6 373 18.0 -241.8 188.8 33.6 18.0 -46.1 192.4 35.1 5.7 195 23.3 240 32.0 205.1 29.4 Integrals Equations of state xn+1 x" dx ;n + -1 RT a ; van der Waals V2 n + 1 Vm In x В RT 1 + Vm + ... ; virial Vm 1 dx 1 - In (аx — b) ax a Nomenclature – but, when in doubt, write it out! AH Change in enthalpy for an arbitrary process (units of energy) AHm Change in enthalpy for an arbitrary process, per mole (energy/mole) AH, or AHn Standard molar enthalpy of reaction, per mole, between separated products and reactants, each in the standard states for the phases specified and at the specified temperature. (energy/mole) rxn 10
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...
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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.
Exergonic Reaction
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
The oxidation of carbon monoxide is important in reducing ground-level pollution from cars:
CO(g) + 1/2 O2 (g) −−→ CO2 (g) (1)
Use the information you have available to answer the following questions.
3a. What is the molar enthalpy of reaction (∆H◦ rxn) for Equation 1 at a temperature of 298 K?
3b. This reaction is typically run using a catalyst at elevated temperature. What is the value of ∆H◦ rxn for Equation 1 at a temperature of 700 K?
3c. Give the molar internal energy of reaction (∆U ◦ rxn) at 700 K for Equation 1
![Useful info
1 bar = 10° Pa
1 atm = 1.013bar
R = 8.314 J/K-mol
NA
= 6.022x1023 mol
= 8.206x10 L-atm/K-mol
3
= 8.206x10° m²-atm/K-mol
8 = 9.807 m/s?
Pm[H2O] = 1.00 g/mL
= 760 Torr
= 62.36 L-Torr/K-mol
1 mbar = 10 bar
1J = 10² L-bar = 9.870×10³ L-atm= 0.2390 cal
= 10² cm= 10° mm= 10° µm = 10° nm=101º A
1J = 1 Pa-m³ 1 L-atm = 101.3 J
1 m³ = 10³ L = 106 cm³
At 298 K (only):
%3D
RT = 2.478 kJ/mol (= 24.46 L-atm/mol)
Physical Properties of Selected Substances
mol. wt.
ΔΗ
Sm
J/(mol·K) J/(mol·K)
Cp,m
AHus melting temp
AHap boiling temp
kJ/mol
g/mol
39.9
kJ/mol
K
kJ/mol
K
154.84
Ar(g)
C(s,grpht.)
CH;OH(1)
CH;OH(g)
CH4(g)
CO(g)
CO,(g)
H,(g)
H,O(1)
H,O(g)
NH;(g)
O2(g)
Properties of pure phases are for standard conditions of 298 K and 1 atm.
Phase transition enthalpies are valid at the indicated phase transition temperature, at 1 atm.
20.786
12.01
8.53
32.04
-238.66
81.6
3.16
175.2
35.29
337.2
32.04
-200.66
43.9
16.04
-74.8
35.3
0.94
91
8.2
112
28.0
-110.53
29.14
44.0
-393.5
213.74
37.11
2.0
116.1
28.8
18.0
-285.8
69.9
75.3
6.0
273
40.6
373
18.0
-241.8
188.8
33.6
18.0
-46.1
192.4
35.1
5.7
195
23.3
240
32.0
205.1
29.4
Integrals
Equations of state
xn+1
x" dx
;n + -1
RT
a
; van der Waals
V2
n + 1
Vm
In x
В
RT
1 +
Vm
+ ...
; virial
Vm
1
dx
1
- In (аx — b)
ax
a
Nomenclature – but, when in doubt, write it out!
AH Change in enthalpy for an arbitrary process (units of energy)
AHm Change in enthalpy for an arbitrary process, per mole (energy/mole)
AH, or AHn Standard molar enthalpy of reaction, per mole, between separated products and reactants, each in the
standard states for the phases specified and at the specified temperature. (energy/mole)
rxn
10](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc8c4ad72-abf5-491c-917a-e417326220cb%2F467c81ce-c2b0-4f3c-96b5-5da2d952cb5b%2Fjgmeq44_processed.png&w=3840&q=75)
Transcribed Image Text:Useful info
1 bar = 10° Pa
1 atm = 1.013bar
R = 8.314 J/K-mol
NA
= 6.022x1023 mol
= 8.206x10 L-atm/K-mol
3
= 8.206x10° m²-atm/K-mol
8 = 9.807 m/s?
Pm[H2O] = 1.00 g/mL
= 760 Torr
= 62.36 L-Torr/K-mol
1 mbar = 10 bar
1J = 10² L-bar = 9.870×10³ L-atm= 0.2390 cal
= 10² cm= 10° mm= 10° µm = 10° nm=101º A
1J = 1 Pa-m³ 1 L-atm = 101.3 J
1 m³ = 10³ L = 106 cm³
At 298 K (only):
%3D
RT = 2.478 kJ/mol (= 24.46 L-atm/mol)
Physical Properties of Selected Substances
mol. wt.
ΔΗ
Sm
J/(mol·K) J/(mol·K)
Cp,m
AHus melting temp
AHap boiling temp
kJ/mol
g/mol
39.9
kJ/mol
K
kJ/mol
K
154.84
Ar(g)
C(s,grpht.)
CH;OH(1)
CH;OH(g)
CH4(g)
CO(g)
CO,(g)
H,(g)
H,O(1)
H,O(g)
NH;(g)
O2(g)
Properties of pure phases are for standard conditions of 298 K and 1 atm.
Phase transition enthalpies are valid at the indicated phase transition temperature, at 1 atm.
20.786
12.01
8.53
32.04
-238.66
81.6
3.16
175.2
35.29
337.2
32.04
-200.66
43.9
16.04
-74.8
35.3
0.94
91
8.2
112
28.0
-110.53
29.14
44.0
-393.5
213.74
37.11
2.0
116.1
28.8
18.0
-285.8
69.9
75.3
6.0
273
40.6
373
18.0
-241.8
188.8
33.6
18.0
-46.1
192.4
35.1
5.7
195
23.3
240
32.0
205.1
29.4
Integrals
Equations of state
xn+1
x" dx
;n + -1
RT
a
; van der Waals
V2
n + 1
Vm
In x
В
RT
1 +
Vm
+ ...
; virial
Vm
1
dx
1
- In (аx — b)
ax
a
Nomenclature – but, when in doubt, write it out!
AH Change in enthalpy for an arbitrary process (units of energy)
AHm Change in enthalpy for an arbitrary process, per mole (energy/mole)
AH, or AHn Standard molar enthalpy of reaction, per mole, between separated products and reactants, each in the
standard states for the phases specified and at the specified temperature. (energy/mole)
rxn
10
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