Use average bond energies to calculate AHxn for the following hydrogenation reaction: H2C=CH2(g) + H2 (g) → H3C-CH3 (g) Express your answer to three significant figures.

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nts i Penodic
Use average bond energies to calculate AH for the following hydrogenation reaction:
H2C=CH2 (g) + H2 (g) → H3C-CH3 (g)
Express your answer to three significant figures.
• View Available Hint(s)
?
AH-m =
124.64
kJ/mol
Submit
Previous Answers Request Answer
X Incorrect; Try Again; 4 attempts remaining
Double check the moles of bonds broken, moles of bonds formed, and the AH values used in
the calculation. The AH is the sum of the AH's of bonds broken and bonds formed. Recall
that energy is released when bonds are broken (positive AH) and consumed when bonds are
formed (negative AH).
AHrxn =E(AH of bonds broken) + (AH of bonds formed)
You may want to review Hint 1. Determine the number and types of bonds broken and formed in
the reaction.
P Pearson
MacBook Air
F1
II FR
F9
F10
F7
&
7
8
Transcribed Image Text:nts i Penodic Use average bond energies to calculate AH for the following hydrogenation reaction: H2C=CH2 (g) + H2 (g) → H3C-CH3 (g) Express your answer to three significant figures. • View Available Hint(s) ? AH-m = 124.64 kJ/mol Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Double check the moles of bonds broken, moles of bonds formed, and the AH values used in the calculation. The AH is the sum of the AH's of bonds broken and bonds formed. Recall that energy is released when bonds are broken (positive AH) and consumed when bonds are formed (negative AH). AHrxn =E(AH of bonds broken) + (AH of bonds formed) You may want to review Hint 1. Determine the number and types of bonds broken and formed in the reaction. P Pearson MacBook Air F1 II FR F9 F10 F7 & 7 8
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