11) 11) Given the following reactions Fe2O3 (s) + 3CO (s) – 2Fe (s) + 3CO2 (g) AH = -28.0 kJ 3Fe (s) + 4CO2(s) – 4CO (g) + Fe3O4(s) AH = +12.5 kJ the enthalpy of the reaction of Fe2O3 with CO 3FE203 (s) + CO (g) - CO2 (g) + 2FE3O4 (s) is kJ. A) +109 E) 40.5 B) -15.5 C) -109 D) -59.0 D. 12) Given the data in the table below, AH°rxn for the reaction 12) 3NO2 (g) + H2O (1) – 2HNO3 (aq) + NO (g) is kJ. Substance AH°f (kJ/mol) H2O (1) -286 NO (g) NO2 (g) 90 34 HNO3 (aq) -207 NH3 (g) -46 A) 140 B) 64 C) -64 D) -140 E) -508 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) The AHrxn 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? 15) 45SSK) 3.
11) 11) Given the following reactions Fe2O3 (s) + 3CO (s) – 2Fe (s) + 3CO2 (g) AH = -28.0 kJ 3Fe (s) + 4CO2(s) – 4CO (g) + Fe3O4(s) AH = +12.5 kJ the enthalpy of the reaction of Fe2O3 with CO 3FE203 (s) + CO (g) - CO2 (g) + 2FE3O4 (s) is kJ. A) +109 E) 40.5 B) -15.5 C) -109 D) -59.0 D. 12) Given the data in the table below, AH°rxn for the reaction 12) 3NO2 (g) + H2O (1) – 2HNO3 (aq) + NO (g) is kJ. Substance AH°f (kJ/mol) H2O (1) -286 NO (g) NO2 (g) 90 34 HNO3 (aq) -207 NH3 (g) -46 A) 140 B) 64 C) -64 D) -140 E) -508 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) The AHrxn 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? 15) 45SSK) 3.
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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Question 13
![11)
11) Given the following reactions
Fe2O3 (s) + 3CO (s) – 2Fe (s) + 3CO2 (g)
AH = -28.0 kJ
3Fe (s) + 4CO2(s) – 4CO (g) + Fe3O4(s)
AH = +12.5 kJ
the enthalpy of the reaction of Fe2O3 with CO
3FE203 (s) + CO (g) - CO2 (g) + 2FE3O4 (s)
is
kJ.
A) +109
E) 40.5
B) -15.5
C) -109
D) -59.0
D.
12) Given the data in the table below, AH°rxn for the reaction
12)
3NO2 (g) + H2O (1) – 2HNO3 (aq) + NO (g)
is
kJ.
Substance AH°f (kJ/mol)
H2O (1)
-286
NO (g)
NO2 (g)
90
34
HNO3 (aq)
-207
NH3 (g)
-46
A) 140
B) 64
C) -64
D) -140
E) -508
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) The AHrxn 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?
15) 45SSK)
3.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1cdef31d-0fd6-49ca-a823-5c1cf3cbca2c%2Fe2831a88-8f79-4ea4-b25d-dd857ee7a276%2Fe3uroar.jpeg&w=3840&q=75)
Transcribed Image Text:11)
11) Given the following reactions
Fe2O3 (s) + 3CO (s) – 2Fe (s) + 3CO2 (g)
AH = -28.0 kJ
3Fe (s) + 4CO2(s) – 4CO (g) + Fe3O4(s)
AH = +12.5 kJ
the enthalpy of the reaction of Fe2O3 with CO
3FE203 (s) + CO (g) - CO2 (g) + 2FE3O4 (s)
is
kJ.
A) +109
E) 40.5
B) -15.5
C) -109
D) -59.0
D.
12) Given the data in the table below, AH°rxn for the reaction
12)
3NO2 (g) + H2O (1) – 2HNO3 (aq) + NO (g)
is
kJ.
Substance AH°f (kJ/mol)
H2O (1)
-286
NO (g)
NO2 (g)
90
34
HNO3 (aq)
-207
NH3 (g)
-46
A) 140
B) 64
C) -64
D) -140
E) -508
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) The AHrxn 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?
15) 45SSK)
3.
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