Representing A Reaction With A Potential Energy Diagram Chemistry Worksheet - Unit 2 Part B Page 10
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1020. What is E
for the reaction represented below that has E
= +235 kJ?
a(fwd)
a(rev)
A + 2CD + 85 kJ → G
What Is Required?
You need to calculate the activation energy of the forward reaction, E
.
a(fwd)
What Is Given?
You know the enthalpy change of the forward reaction: H
= +85 kJ
r
You know the activation energy of the reverse reaction: E
= +235 kJ
a(rev)
Plan Your Strategy
Act on Your Strategy
Use the formula
'
H
E
E
r
a(fwd)
a(rev)
to calculate
'
H
E
E
85 kJ
( 235 kJ)
E
r
a(fwd)
a(rev)
a(fwd)
E
.
320 kJ
E
a(fwd)
a(fwd)
Check Your Solution
Check that the given values have been substituted correctly with the proper sign.
Unit 3 Part B
MHR 133
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