11) Given the following reactions 11) D Fe2O3 (s) + 3CO (s) – 2Fe (s) + 3CO2 (g) AH = -28.0 kJ 3Fe (s) + 4CO2(s) - 4CO (g) + Fe3O4(s) ΔΗ+12.5 kJ the enthalpy of the reaction of Fe2O3 with CO 3FE203 (s) + CO (g) - CO2 (g) + 2Fe3O4 (s) is kJ. A) +109 B) -15.5 E) 40.5 C) -109 12) Given the data in the table below, AH°rxn for the reaction D) -59.0 12) 3NO2 (g) + H2O (1) – 2HNO3 (aq) + NO (g) is kJ. Substance AH°f (kJ/mol) H2O (1) NO (g) NO2 (g) -286 90 34 HNO3 (aq) -207 NH3 (g) -46 D) -140 E) -508 A) 140 B) 64 C) -64 13) B 13) A sample of calcium carbonate [CaCO3 (s)] absorbs 40.3 J of heat, upon which the temperature of the sample increases from 20.8 °C to 27.3 °C. If the specific heat of calcium carbonate is 0.82 J/g-K, what is the mass (in grams) of the sample? A) 5.1 g B) 7.6 g C) -7.6 g D) 0.13 g E) 5.3 g 14) D 14) The temperature of a 35.1 g sample of iron increases from 24.5 °C to 31.8 °C. If the specific heat of iron is 0.450 J/g-K, how many joules of heat are absorbed? A) 0.722 J B) 0.0936 J C) -115 J D) 115 J E) 3.29 J SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 15) 455SkJ 15) The AHrYn for the combustion of methane is -890.0 kJ. How much heat energy (kJ) is released if 82.1 grams of methane are burned in an excess amount of oxygen? 3. S Jodward toltzfus • Michael W. Lufan
11) Given the following reactions 11) D Fe2O3 (s) + 3CO (s) – 2Fe (s) + 3CO2 (g) AH = -28.0 kJ 3Fe (s) + 4CO2(s) - 4CO (g) + Fe3O4(s) ΔΗ+12.5 kJ the enthalpy of the reaction of Fe2O3 with CO 3FE203 (s) + CO (g) - CO2 (g) + 2Fe3O4 (s) is kJ. A) +109 B) -15.5 E) 40.5 C) -109 12) Given the data in the table below, AH°rxn for the reaction D) -59.0 12) 3NO2 (g) + H2O (1) – 2HNO3 (aq) + NO (g) is kJ. Substance AH°f (kJ/mol) H2O (1) NO (g) NO2 (g) -286 90 34 HNO3 (aq) -207 NH3 (g) -46 D) -140 E) -508 A) 140 B) 64 C) -64 13) B 13) A sample of calcium carbonate [CaCO3 (s)] absorbs 40.3 J of heat, upon which the temperature of the sample increases from 20.8 °C to 27.3 °C. If the specific heat of calcium carbonate is 0.82 J/g-K, what is the mass (in grams) of the sample? A) 5.1 g B) 7.6 g C) -7.6 g D) 0.13 g E) 5.3 g 14) D 14) The temperature of a 35.1 g sample of iron increases from 24.5 °C to 31.8 °C. If the specific heat of iron is 0.450 J/g-K, how many joules of heat are absorbed? A) 0.722 J B) 0.0936 J C) -115 J D) 115 J E) 3.29 J SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 15) 455SkJ 15) The AHrYn for the combustion of methane is -890.0 kJ. How much heat energy (kJ) is released if 82.1 grams of methane are burned in an excess amount of oxygen? 3. S Jodward toltzfus • Michael W. Lufan
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.62QE: A 50-mL solution of a dilute AgNO3 solution is added to 100 mL of a base solution in a coffee-cup...
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Question
Question 13
![11) Given the following reactions
11) D
Fe2O3 (s) + 3CO (s) – 2Fe (s) + 3CO2 (g)
AH = -28.0 kJ
3Fe (s) + 4CO2(s) - 4CO (g) + Fe3O4(s)
ΔΗ+12.5 kJ
the enthalpy of the reaction of Fe2O3 with CO
3FE203 (s) + CO (g) - CO2 (g) + 2Fe3O4 (s)
is
kJ.
A) +109
B) -15.5
E) 40.5
C) -109
12) Given the data in the table below, AH°rxn for the reaction
D) -59.0
12)
3NO2 (g) + H2O (1) – 2HNO3 (aq) + NO (g)
is
kJ.
Substance AH°f (kJ/mol)
H2O (1)
NO (g)
NO2 (g)
-286
90
34
HNO3 (aq)
-207
NH3 (g)
-46
D) -140
E) -508
A) 140
B) 64
C) -64
13) B
13) A sample of calcium carbonate [CaCO3 (s)] absorbs 40.3 J of heat, upon which the temperature of
the sample increases from 20.8 °C to 27.3 °C. If the specific heat of calcium carbonate is 0.82 J/g-K,
what is the mass (in grams) of the sample?
A) 5.1 g
B) 7.6 g
C) -7.6 g
D) 0.13 g
E) 5.3 g
14) D
14) The temperature of a 35.1 g sample of iron increases from 24.5 °C to 31.8 °C. If the specific heat of
iron is 0.450 J/g-K, how many joules of heat are absorbed?
A) 0.722 J
B) 0.0936 J
C) -115 J
D) 115 J
E) 3.29 J
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
15) 455SkJ
15) The AHrYn for the combustion of methane is -890.0 kJ. How much heat energy (kJ) is
released if 82.1 grams of methane are burned in an excess amount of oxygen?
3.
S
Jodward
toltzfus • Michael W. Lufan](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1cdef31d-0fd6-49ca-a823-5c1cf3cbca2c%2Fda2fa5e3-58ec-433f-8726-ed45de9d662f%2Fz21ucu.jpeg&w=3840&q=75)
Transcribed Image Text:11) Given the following reactions
11) D
Fe2O3 (s) + 3CO (s) – 2Fe (s) + 3CO2 (g)
AH = -28.0 kJ
3Fe (s) + 4CO2(s) - 4CO (g) + Fe3O4(s)
ΔΗ+12.5 kJ
the enthalpy of the reaction of Fe2O3 with CO
3FE203 (s) + CO (g) - CO2 (g) + 2Fe3O4 (s)
is
kJ.
A) +109
B) -15.5
E) 40.5
C) -109
12) Given the data in the table below, AH°rxn for the reaction
D) -59.0
12)
3NO2 (g) + H2O (1) – 2HNO3 (aq) + NO (g)
is
kJ.
Substance AH°f (kJ/mol)
H2O (1)
NO (g)
NO2 (g)
-286
90
34
HNO3 (aq)
-207
NH3 (g)
-46
D) -140
E) -508
A) 140
B) 64
C) -64
13) B
13) A sample of calcium carbonate [CaCO3 (s)] absorbs 40.3 J of heat, upon which the temperature of
the sample increases from 20.8 °C to 27.3 °C. If the specific heat of calcium carbonate is 0.82 J/g-K,
what is the mass (in grams) of the sample?
A) 5.1 g
B) 7.6 g
C) -7.6 g
D) 0.13 g
E) 5.3 g
14) D
14) The temperature of a 35.1 g sample of iron increases from 24.5 °C to 31.8 °C. If the specific heat of
iron is 0.450 J/g-K, how many joules of heat are absorbed?
A) 0.722 J
B) 0.0936 J
C) -115 J
D) 115 J
E) 3.29 J
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
15) 455SkJ
15) The AHrYn for the combustion of methane is -890.0 kJ. How much heat energy (kJ) is
released if 82.1 grams of methane are burned in an excess amount of oxygen?
3.
S
Jodward
toltzfus • Michael W. Lufan
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