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T-11
CALCULATIONS TO DETERMINE THE VALUE OF THE ACTIVATION ENERGY:
1.
Complete Table I on p T-13 as you did in the previous experiment and include it with this page.
(1.0 mark) (Include all the calculations in the spaces provided in the Table or on a separate sheet
if additional space is required.)
2.
Complete the following table relating the temperature to reaction rate.(0.3 marks)
Temperature
1/T
k
ln k
°C
K
(K
-1
)
(from Table I)
a)
Plot ln k (from Table I) against 1/T(K) on graph paper with a 1.0 mm grid using a
suitable scale, and draw the best fit line through the points. Submit this graph. Make sure
that the plot covers between 60-90% of the graph paper (1.0 mark)
b)
Determine the slope of the line and calculate the value of E
a
. Show calculations (including
units and significant figures) (0.7 marks).
