Question

For the first-order reaction X ⟶ products, which of the following graphs is best for determining...

For the first-order reaction X ⟶ products, which of the following graphs is best for determining the activation energy, Ea ?

Note:

  1. The best choice is the one that yields a straight line graph with the slope directly proportional to Ea .
  2. In the options below, T is the kelvin temperature and t is time.
(a)

k versus 1/T

(b)

1 / [X] versus t

(c)

ln k versus T

(d)

ln [X] versus t

(e)

[X] versus t

(f)

  Rate versus t

(g)

[X]2 versus t

(h)

ln k versus t

(i)

ln k versus 1/T

.

.

Consider the reaction A ⇌ B which is exothermic in the forward direction. Which of the following increase(s) when the temperature increases.

You may select more than one, or none, of the options.

(a)

the forward rate

(b)

the equilibrium constant

(c)

the reverse rate

(d)

Ea (reverse)

(e)

Ea (forward)

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