11) D 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 3FE2O3 (s) + CO (g) - CO2 (g) + 2FE304 (S) is kJ. A) +109 B) -15.5 C) -109 D) -59.0 E) 40.5 12) Given the data in the table below, AH°ryn 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 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 of 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) 4555K) 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? 3.
11) D 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 3FE2O3 (s) + CO (g) - CO2 (g) + 2FE304 (S) is kJ. A) +109 B) -15.5 C) -109 D) -59.0 E) 40.5 12) Given the data in the table below, AH°ryn 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 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 of 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) 4555K) 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? 3.
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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Question 12
![11) D
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
3FE2O3 (s) + CO (g) - CO2 (g) + 2FE304 (S)
is
kJ.
A) +109
B) -15.5
C) -109
D) -59.0
E) 40.5
12) Given the data in the table below, AH°ryn 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
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
of
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) 4555K)
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?
3.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1cdef31d-0fd6-49ca-a823-5c1cf3cbca2c%2F7244e05e-ced3-4d96-bb55-3c71eb59fff6%2Fhrall8b.jpeg&w=3840&q=75)
Transcribed Image Text:11) D
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
3FE2O3 (s) + CO (g) - CO2 (g) + 2FE304 (S)
is
kJ.
A) +109
B) -15.5
C) -109
D) -59.0
E) 40.5
12) Given the data in the table below, AH°ryn 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
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
of
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) 4555K)
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?
3.
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