1) When a mass, m, of cyclohexane is burnt in a constant volume bomb calorimeter with heat capacity Ccal, the temperature of the water surrounding the calorimeter is raised by AТ. The heat of combustion of the nichrome wire used to ignite the reactive mixture is q. The lengths of the nichrome wire before and after combustion are Lo and L, respectively. The combustion reaction is carried out at temerature T and pressure P. The standard molar enthalpy of combustion of cyclohexane is written as A ¿H° . Table 1 Experimental conditions and thermodynamic data for AH° m Ccal q Lo L T P the combustion in the bomb calorimeter -3951 +/- 19 kJ/mol 0.78 0.002 g 8222.0+/8.0 J/k -9.6 J/cm 9. 39 +0.05 cm 3. 39 +0.05 cm 20.65 0.04 °C 25.8 +/- 1.0 bar a) Write a balanced equation for the combustion of cyclohexane. (Make sure all stoichiometric coefficients are the smallest possible integers, even if they are "1". Pay attention to phases!) (1) + (1) + (g) Δ b) Using data from Table 1 and from the lab handouts, predict the temperature rise for the water surrounding the calorimeter, ATн, and its standard deviation using the propagation of error method. (Pay attention to the number of sigificant digits used for the molar mass and the gas constant!) ATH₂O = +/- c) Given that the magnitudes of the standard molar heat of combustion of graphite and hydrogen (H2) are -285.83 and -395.51 kJ/mol respectively, determine the standard molar head of formation (A (H) of cyclohexane using the appropriate data from Table 1. (Pay attention to the signs!) A&H = +/- kJ/mol d) Given the standard molar enthalpy of formation of hexane is -167.2 kJ/mol, determine the C-C bond dissociation energy of cyclohexane. BDE (C-C) = +/- kJ/mol
1) When a mass, m, of cyclohexane is burnt in a constant volume bomb calorimeter with heat capacity Ccal, the temperature of the water surrounding the calorimeter is raised by AТ. The heat of combustion of the nichrome wire used to ignite the reactive mixture is q. The lengths of the nichrome wire before and after combustion are Lo and L, respectively. The combustion reaction is carried out at temerature T and pressure P. The standard molar enthalpy of combustion of cyclohexane is written as A ¿H° . Table 1 Experimental conditions and thermodynamic data for AH° m Ccal q Lo L T P the combustion in the bomb calorimeter -3951 +/- 19 kJ/mol 0.78 0.002 g 8222.0+/8.0 J/k -9.6 J/cm 9. 39 +0.05 cm 3. 39 +0.05 cm 20.65 0.04 °C 25.8 +/- 1.0 bar a) Write a balanced equation for the combustion of cyclohexane. (Make sure all stoichiometric coefficients are the smallest possible integers, even if they are "1". Pay attention to phases!) (1) + (1) + (g) Δ b) Using data from Table 1 and from the lab handouts, predict the temperature rise for the water surrounding the calorimeter, ATн, and its standard deviation using the propagation of error method. (Pay attention to the number of sigificant digits used for the molar mass and the gas constant!) ATH₂O = +/- c) Given that the magnitudes of the standard molar heat of combustion of graphite and hydrogen (H2) are -285.83 and -395.51 kJ/mol respectively, determine the standard molar head of formation (A (H) of cyclohexane using the appropriate data from Table 1. (Pay attention to the signs!) A&H = +/- kJ/mol d) Given the standard molar enthalpy of formation of hexane is -167.2 kJ/mol, determine the C-C bond dissociation energy of cyclohexane. BDE (C-C) = +/- kJ/mol
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 5.105QE
Related questions
Question
slove part D
Transcribed Image Text:1) When a mass, m, of cyclohexane is burnt in a constant volume bomb calorimeter with heat capacity Ccal, the temperature of
the water surrounding the calorimeter is raised by AТ. The heat of combustion of the nichrome wire used to ignite the
reactive mixture is q. The lengths of the nichrome wire before and after combustion are Lo and L, respectively. The combustion
reaction is carried out at temerature T and pressure P. The standard molar enthalpy of combustion of cyclohexane is written as
A ¿H° .
Table 1 Experimental conditions and thermodynamic data for
AH°
m
Ccal
q
Lo
L
T
P
the combustion in the bomb calorimeter
-3951 +/- 19 kJ/mol
0.78 0.002 g
8222.0+/8.0 J/k
-9.6 J/cm
9. 39 +0.05 cm
3. 39 +0.05 cm
20.65 0.04 °C
25.8 +/- 1.0 bar
a) Write a balanced equation for the combustion of cyclohexane. (Make sure all stoichiometric coefficients are the smallest
possible integers, even if they are "1". Pay attention to phases!)
(1) +
(1) +
(g)
Δ
b) Using data from Table 1 and from the lab handouts, predict the temperature rise for the water surrounding the
calorimeter, ATн, and its standard deviation using the propagation of error method. (Pay attention to the number of
sigificant digits used for the molar mass and the gas constant!)
ATH₂O
=
+/-
c) Given that the magnitudes of the standard molar heat of combustion of graphite and hydrogen (H2) are -285.83 and -395.51
kJ/mol respectively, determine the standard molar head of formation (A (H) of cyclohexane using the appropriate data from
Table 1. (Pay attention to the signs!)
A&H =
+/-
kJ/mol
d) Given the standard molar enthalpy of formation of hexane is -167.2 kJ/mol, determine the C-C bond dissociation energy of
cyclohexane.
BDE (C-C) =
+/-
kJ/mol
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
Recommended textbooks for you
Chemistry: Principles and Practice
Chemistry
ISBN:
9780534420123
Author:
Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:
Cengage Learning
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
EBK A SMALL SCALE APPROACH TO ORGANIC L
Chemistry
ISBN:
9781305446021
Author:
Lampman
Publisher:
CENGAGE LEARNING - CONSIGNMENT
Chemistry: Principles and Practice
Chemistry
ISBN:
9780534420123
Author:
Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:
Cengage Learning
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
EBK A SMALL SCALE APPROACH TO ORGANIC L
Chemistry
ISBN:
9781305446021
Author:
Lampman
Publisher:
CENGAGE LEARNING - CONSIGNMENT
Principles of Modern Chemistry
Chemistry
ISBN:
9781305079113
Author:
David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:
Cengage Learning
General Chemistry - Standalone book (MindTap Cour…
Chemistry
ISBN:
9781305580343
Author:
Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning