Question b(i) , (ii) and (iii) from Q14.jpeg and b) from Q15.jpeg i)Bond energy term for the C-H bond.The enthalpy of hydrogenation of But-1-ene (CH2 = CH-CH2-CH3) is-127 KJmol but the value for Buta-1, 3-diene (CH2 = CH-CH = CH2) is not - 254KJMas might be expected, but -239KJmol". How do you account for this?b)%3D%3D%3D.... b)You are given the following thermochemical data:Standard Enthalpy ofStandard Enthalpy of CombustionAH c/KJMOI1atomisation AHa/KJMOIC(graphwie)H2(g)- 394715- 286218CHGCalculate the following:- 891Standard enthalpy of formation of methane.i)the enthalpy of atomisation of methane.

Answered: Image /qna-images/answer/e235526d-ed31-4f8f-86c8-39b14b52b653.jpg

iii) Bond energy term for the C-H bond. The enthalpy of hydrogenation of But-1-ene (CH2 = CH-CH2-CH3) is - 127 KJmol but the value for Buta-1, 3-diene (CH2 = CH-CH = CH2) is not - 254KJM- as might be expected, but-239KJmol". How do you account for this? b) %3D %3D

iii) Bond energy term for the C-H bond. The enthalpy of hydrogenation of But-1-ene (CH2 = CH-CH2-CH3) is - 127 KJmol but the value for Buta-1, 3-diene (CH2 = CH-CH = CH2) is not - 254KJM- as might be expected, but-239KJmol". How do you account for this? b) %3D %3D

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter8: Thermochemistry

Section: Chapter Questions

Problem 83QAP: Determine whether the statements given below are true or false. Consider enthalpy (H). (a) It is a...

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Question

Question b(i) , (ii) and (iii) from Q14.jpeg and b) from Q15.jpeg

i)
Bond energy term for the C-H bond.
The enthalpy of hydrogenation of But-1-ene (CH2 = CH-CH2-CH3) is
-127 KJmol but the value for Buta-1, 3-diene (CH2 = CH-CH = CH2) is not - 254KJM
as might be expected, but -239KJmol". How do you account for this?
b)
%3D
%3D
%3D
....

b)
You are given the following thermochemical data:
Standard Enthalpy of
Standard Enthalpy of Combustion
AH c/KJMOI1
atomisation AHa/KJMOI
C(graphwie)
H2(g)
- 394
715
- 286
218
CHG
Calculate the following:
- 891
Standard enthalpy of formation of methane.
i)
the enthalpy of atomisation of methane.

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