(a) Obtain the standard combustion enthalpy [kJ / mol] of methylamine at 25 °C. However, it is assumed that methylamine is completely burned to produce nitrogen, carbon dioxide and water.
(a) Obtain the standard combustion enthalpy [kJ / mol] of methylamine at 25 °C. However, it is assumed that methylamine is completely burned to produce nitrogen, carbon dioxide and water.
Chemistry
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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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![No.1
(a) Obtain the standard combustion enthalpy [kJ / mol] of methylamine at 25 ° C.
However, it is assumed that methylamine is completely burned to produce
nitrogen, carbon dioxide and water.
(b) An ideal gas with a constant volume heat capacity of 20.8 J / K, a pressure of
4.25 atm, and a temperature of 300 K, 1.00 mol, adiabatically expanded in a
quasi-static process to a pressure of 2.50 atm. Find the volume and temperature
at this time, and the work that the gas makes to the external/physical world.
(c) In adiabatic change, if the ideal gas expands, the internal energy is used for
the expansion work, so the temperature of the gas drops. On the other hand, the
temperature does not change in the Joule experiment shown in Figure below.
Explain this difference.
Thermometer
stopcock
evacuated
gas](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe14bae7d-3dcf-402d-88fc-e5dfc1cd9ccb%2F38daca7a-0915-47c5-bc9c-20e191d36ad3%2Fm6v91f5_processed.png&w=3840&q=75)
Transcribed Image Text:No.1
(a) Obtain the standard combustion enthalpy [kJ / mol] of methylamine at 25 ° C.
However, it is assumed that methylamine is completely burned to produce
nitrogen, carbon dioxide and water.
(b) An ideal gas with a constant volume heat capacity of 20.8 J / K, a pressure of
4.25 atm, and a temperature of 300 K, 1.00 mol, adiabatically expanded in a
quasi-static process to a pressure of 2.50 atm. Find the volume and temperature
at this time, and the work that the gas makes to the external/physical world.
(c) In adiabatic change, if the ideal gas expands, the internal energy is used for
the expansion work, so the temperature of the gas drops. On the other hand, the
temperature does not change in the Joule experiment shown in Figure below.
Explain this difference.
Thermometer
stopcock
evacuated
gas
Transcribed Image Text:For question (a) use table 4.4 and 4.5 to answer it.
Table 4.4 Thermodynamic data of inorganic substances
AH /kJ mol" AG/kJ mol S/JK" mel
物 質
Ag (s)
Ag (g)
42.55
284.55
245.65
173.00
ARCI (s)
-127.07
- 109.79
96.2
C (s, M)
C(s, ダイヤモンド)
C (g)
Co (g)
CO. (g)
Cl (g)
CI (g)
F. (g)
F(g)
5.740
1.895
2.900
2.377
716,68
671.26
158, 10
-110.53
-137.17
197.67
-393.51
-394.36
213.74
223.07
121.68
105.68
165.20
202.78
158.75
130.684
78.99
61.91
H, (g)
H(g)
217.97
203.25
114.71
HCI (g)
HF (g)
-92.31
-95.30
186.91
-271.1
-273.2
173.78
HO (1)
-285.83
-237.13
69.91
HO (g)
-241.82
-228.57
188.83
N, (g)
191.61
N (g)
472.70
455.56
153.30
NH, (g)
192.45
210.76
240.06
304.29
51.21
153.71
72.13
-46.11
-16.45
NO (g)
NO, (g)
NO. (g)
90.25
86.55
33.18
51.31
9.16
97.89
Na (s)
Na (g)
NaCI (s)
107.32
76.76
-411.15
-384.14
NaOH (s)
-425.61
64. 46
205.138
-379.49
O, (g)
O (g)
249.17
231.73
161.06
Table 4.4 Thermodynamic data of organic compounds
AH AJ mol AGA mol s/JK"m
メタンClH(g)
エタン CH(g)
プロパンCH(g)
プタンCH(g)
エチレンClI,(g)
cis-2-プテンHCCH=CCHH(g)
tras-2-プテンHCCH=CHCH(g)
アセチレン CH(g)
ペンゼンCH (ID
メタノール CHO (1)
エタノールCHOH (1)
ホルムアルデヒド HCHO(g)
アセトアルデヒド CHCHO (1)
*R HCHO ()
-74.81
-50.72
186. 26
229.00
-84.68
-32. 82
-23.49
-17.03
-103.85
29.91
- 126.15
310.23
219.56
52.26
68. 15
-6.99
65.95
300.94
-11.17
63.06
296.59
226.73
209.20
200.94
49.0
124.3
173.3
-238.66
-166.27
136.8
-277.69
-174.78
160.7
-108.57
- 192.30
-424.72
-102.53
218.77
-128.12
160.2
128.95
139.8
-361.35
MR CH,COOH (I
アセトン(CH)CO (1)
メチルアミン CHNH, (g)
-484.5
-389.9
-248.1
-155.4
200.4
-22.97
32. 16
243.41
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