Activity 2 - 8 A] Calculate AH° for the reaction C2H4(g) + 3 O2(g) 2CO2(g) + 2H2O(g) The average bond energies of various bonds are: Bond С -Н 0 = 0 C = 0 О-Н C = C Energy 414 499 724 460 619 kJ mol-! B] Compare the values of AH° obtained by using the enthalpy of formation data: AH: [CO2] = -393.5 kJ mol·', AH? [H2O(g)] = -241.8 kJ mol', and AH? [C2H42] = 52.3 kJ mol1.
Activity 2 - 8 A] Calculate AH° for the reaction C2H4(g) + 3 O2(g) 2CO2(g) + 2H2O(g) The average bond energies of various bonds are: Bond С -Н 0 = 0 C = 0 О-Н C = C Energy 414 499 724 460 619 kJ mol-! B] Compare the values of AH° obtained by using the enthalpy of formation data: AH: [CO2] = -393.5 kJ mol·', AH? [H2O(g)] = -241.8 kJ mol', and AH? [C2H42] = 52.3 kJ mol1.
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Activity 2-8
![Activity 2 - 8
A] Calculate AH° for the reaction
C2H4(g) + 3 O2(g) 2CO2(g) + 2H2O(g)
The average bond energies of various bonds are:
Bond
С -Н
0 = 0
C = 0
О-Н
C = C
Energy
414
499
724
460
619
kJ mol-!
B] Compare the values of AH° obtained by using the enthalpy of
formation data: AH: [CO2] = -393.5 kJ mol·', AH? [H2O(g)]
= -241.8 kJ mol', and AHº [C2H4(g)] = 52.3 kJ mol'.
2.3.3 Hess's law
Hess' law is an application of the state function property of enthalpy.
The AH value of a reaction can be obtained by adding or subtracting enthalpies
of the reactions to yield the desired reaction.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9f1377a6-0384-45ba-92bc-919b2d05ef4c%2Fa0708a83-d510-4199-8180-728ae289597b%2Fahubfpj_processed.png&w=3840&q=75)
Transcribed Image Text:Activity 2 - 8
A] Calculate AH° for the reaction
C2H4(g) + 3 O2(g) 2CO2(g) + 2H2O(g)
The average bond energies of various bonds are:
Bond
С -Н
0 = 0
C = 0
О-Н
C = C
Energy
414
499
724
460
619
kJ mol-!
B] Compare the values of AH° obtained by using the enthalpy of
formation data: AH: [CO2] = -393.5 kJ mol·', AH? [H2O(g)]
= -241.8 kJ mol', and AHº [C2H4(g)] = 52.3 kJ mol'.
2.3.3 Hess's law
Hess' law is an application of the state function property of enthalpy.
The AH value of a reaction can be obtained by adding or subtracting enthalpies
of the reactions to yield the desired reaction.
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