Keview | Constants | Perodic Tabl Part B The combustion of heptane, C7H16, occurs via the reaction C;H16(g) + 1102(g)→7CO2(g) + 8H,0(g) with heat of formation values given by the following table: AH (kJ/mol) Substance C,H16 (g) -187.9 CO2(g) -393.5 H2O(g) -241.8 Calculate the enthalpy for the combustion of 1 mole of heptane. Express your answer to four significant figures and include the appropriate units. • View Available Hint(s) HA AHa = Value Units Submit Previous Answers X Incorrect; Try Again; 3 attempts remaining Standard heat of formation values are given in kJ/mol. however when calculating the enthalpy of combustion for a specific reaction you must multiply each formation value by the coefficient in the chemical equation. This coefficient represent the number of moles of each compound, thus the final units should be in kJ. You mav want to review Hint 1. How to anoroach the nemblem P Pearson Huration Inc. All rights reserved. I Terms of Use | Privacy Policy | Permissions I Contact Us
Keview | Constants | Perodic Tabl Part B The combustion of heptane, C7H16, occurs via the reaction C;H16(g) + 1102(g)→7CO2(g) + 8H,0(g) with heat of formation values given by the following table: AH (kJ/mol) Substance C,H16 (g) -187.9 CO2(g) -393.5 H2O(g) -241.8 Calculate the enthalpy for the combustion of 1 mole of heptane. Express your answer to four significant figures and include the appropriate units. • View Available Hint(s) HA AHa = Value Units Submit Previous Answers X Incorrect; Try Again; 3 attempts remaining Standard heat of formation values are given in kJ/mol. however when calculating the enthalpy of combustion for a specific reaction you must multiply each formation value by the coefficient in the chemical equation. This coefficient represent the number of moles of each compound, thus the final units should be in kJ. You mav want to review Hint 1. How to anoroach the nemblem P Pearson Huration Inc. All rights reserved. I Terms of Use | Privacy Policy | Permissions I Contact Us
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter21: The Chemistry Of The Main Group Elements
Section: Chapter Questions
Problem 33PS: When boron hydrides burn in air, the reactions are very exothermic (a) Write a balanced equation for...
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![cores
revie
Constants | Periodic Table
The standard heat of formation, AH, is defined as
the enthalpy change for the formation of one mole of
substance from its constituent elements in their
earson eText
Part B
standard states. Thus, elements in their standard states
have AH
= 0. Heat of formation values can be used
Study Area
The combustion of heptane, C7H16, 0ccurs via the reaction
to calculate the enthalpy change of any reaction.
C7H16(g) + 1102(g)→7CO2(g) + 8H2O(g)
Document Sharing
Consider, for example, the reaction
with heat of formation values given by the following table:
2NO(g) + O2(g)= 2NO2(g)
AH
(kJ/mol)
User Settings
Substance
with heat of formation values given by the following
table:
C,H16 (g)
-187.9
Course Tools
Substance
(kJ/mol)
CO2(g)
-393.5
NO(g)
H2O(g)
-241.8
90.2
O2(g)
Calculate the enthalpy for the combustion of 1 mole of heptane.
NO2(g)
33.2
Express your answer to four significant figures and include the appropriate units.
· View Available Hint(s)
Then the standard heat of reaction for the overall
reaction is
?
AHm= AH (products)- AH; (reactants)
[2(90.2) + 0]
HA
2(33.2)
-114 kJ
AHm =
Value
Units
Submit
Previous Answers
X Incorrect; Try Again; 3 attempts remaining
Standard heat of formation values are given in kJ/mol, however when calculating the enthalpy
of combustion for a specific reaction you must multiply each formation value by the coefficient in
the chemical equation. This coefficient represent the number of moles of each compound, thus
the final units should be in kJ.
You may want to review Hint 1. How to approach the problem
P Pearson
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Transcribed Image Text:cores
revie
Constants | Periodic Table
The standard heat of formation, AH, is defined as
the enthalpy change for the formation of one mole of
substance from its constituent elements in their
earson eText
Part B
standard states. Thus, elements in their standard states
have AH
= 0. Heat of formation values can be used
Study Area
The combustion of heptane, C7H16, 0ccurs via the reaction
to calculate the enthalpy change of any reaction.
C7H16(g) + 1102(g)→7CO2(g) + 8H2O(g)
Document Sharing
Consider, for example, the reaction
with heat of formation values given by the following table:
2NO(g) + O2(g)= 2NO2(g)
AH
(kJ/mol)
User Settings
Substance
with heat of formation values given by the following
table:
C,H16 (g)
-187.9
Course Tools
Substance
(kJ/mol)
CO2(g)
-393.5
NO(g)
H2O(g)
-241.8
90.2
O2(g)
Calculate the enthalpy for the combustion of 1 mole of heptane.
NO2(g)
33.2
Express your answer to four significant figures and include the appropriate units.
· View Available Hint(s)
Then the standard heat of reaction for the overall
reaction is
?
AHm= AH (products)- AH; (reactants)
[2(90.2) + 0]
HA
2(33.2)
-114 kJ
AHm =
Value
Units
Submit
Previous Answers
X Incorrect; Try Again; 3 attempts remaining
Standard heat of formation values are given in kJ/mol, however when calculating the enthalpy
of combustion for a specific reaction you must multiply each formation value by the coefficient in
the chemical equation. This coefficient represent the number of moles of each compound, thus
the final units should be in kJ.
You may want to review Hint 1. How to approach the problem
P Pearson
Copyright O 2021 Pearson Education Inc. All rights reserved. Terms of Use Privacy Policy I Permissions | Contact Us |
12:43 PM
23
87°F Sunny
6/20/2021
90
P Type here to search
PgDn
PgUp
F11
F12 Ins
End
PrtScn
F8
Home
F9
F10
F7
DII
F6
F5
F4
F2
F3
F1
&
(@
8.
#
%24
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