steps. The uvelan U number of enzyme-catalyzed is C6H1206 (s) → 2C2H3OH(I) + 2CO2(g) Calculate the standard enthalpy change for this reac- tion, assuming that the carbohydrate is a-D-glucose. Bond Enthalpy 3.58 (a) Explain why the bond enthalpy of a molecule is always defined in terms of a gas-phase reaction. (b) The bond dissociation enthalpy of F2 is 150.6 kJ mol-1. Calculate the value of ArHo for F(g) 3.59 From the molar enthalpy of vaporization of water at 373 K and the bond dissociation enthalpies of H2 and O2 (see Table 3.4), calculate the average O-H bond enthalpy in water, given that H2(0) +02(9) H2Ou) 285.8 kJ mol-1 3.60 Use the bond enthalpy values in Table 3.4 to cal- culate the enthalpy of combustion for ethane, 2C2H6(g) + 702 (g) → 4CO2(g) + 6H20(1) Compare your result with that calculated from the nthalpy of formation values of the products and reac- ants listed in Appendix 2.
steps. The uvelan U number of enzyme-catalyzed is C6H1206 (s) → 2C2H3OH(I) + 2CO2(g) Calculate the standard enthalpy change for this reac- tion, assuming that the carbohydrate is a-D-glucose. Bond Enthalpy 3.58 (a) Explain why the bond enthalpy of a molecule is always defined in terms of a gas-phase reaction. (b) The bond dissociation enthalpy of F2 is 150.6 kJ mol-1. Calculate the value of ArHo for F(g) 3.59 From the molar enthalpy of vaporization of water at 373 K and the bond dissociation enthalpies of H2 and O2 (see Table 3.4), calculate the average O-H bond enthalpy in water, given that H2(0) +02(9) H2Ou) 285.8 kJ mol-1 3.60 Use the bond enthalpy values in Table 3.4 to cal- culate the enthalpy of combustion for ethane, 2C2H6(g) + 702 (g) → 4CO2(g) + 6H20(1) Compare your result with that calculated from the nthalpy of formation values of the products and reac- ants listed in Appendix 2.
Chemistry: Matter and Change
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Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter15: Energy And Chemical Change
Section: Chapter Questions
Problem 112A: sample of natural gas is analyzed and found to be88.4% methane (CH4) and 11.6% ethane (C2H6) bymass....
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Question
3.58
Transcribed Image Text:steps.
The
uvelan
U
number of enzyme-catalyzed
is
C6H1206 (s) → 2C2H3OH(I) + 2CO2(g)
Calculate the standard enthalpy change for this reac-
tion, assuming that the carbohydrate is a-D-glucose.
Bond Enthalpy
3.58 (a) Explain why the bond enthalpy of a molecule
is always defined in terms of a gas-phase reaction.
(b) The bond dissociation enthalpy of F2 is 150.6 kJ
mol-1. Calculate the value of ArHo for F(g)
3.59 From the molar enthalpy of vaporization of water
at 373 K and the bond dissociation enthalpies of H2
and O2 (see Table 3.4), calculate the average O-H bond
enthalpy in water, given that
H2(0) +02(9) H2Ou)
285.8 kJ mol-1
3.60 Use the bond enthalpy values in Table 3.4 to cal-
culate the enthalpy of combustion for ethane,
2C2H6(g) + 702 (g) → 4CO2(g) + 6H20(1)
Compare your result with that calculated from the
nthalpy of formation values of the products and reac-
ants listed in Appendix 2.
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