5. concepts110 Based on their activation energies and energy changes and assumin

Question

5. concepts110
Based on their activation energies and energy changes and assumingthat all collision factors are the same, which of the followingreactions would be fastest and which would be slowest?
(a) Ea = 45kJ/mol; E = -25 kJ/mol
(b) Ea = 35kJ/mol; E = -10 kJ/mol
(c) Ea = 55kJ/mol; E = 10 kJ/mol

a will be fastest and b will beslowest.
b will be fastest and a will beslowest.
a will be fastest and c will beslowest.
b will be fastest and c will beslowest
c will be fastest and a will beslowest.
c will be fastest and b will be slowest.

Thanks!

Explanation / Answer

b) is fastest because it is exothermic and has the lowestactivation barrier. c) is slowest because it has highest activation barrier and is alsoendothermic So should be b will befastest and c will be slowest

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