When a graph is plotted between 1/T on X-axis and log k on y-axis a straight line is obtained with a negative slope which has two end in__________________?
Correct answer: D. II and IV quadrant
- A. I and II quadrant
- B. II and III quadrant
- C. III and IV quadrant
- D. II and IV quadrant
Explanation
The Arrhenius equation in logarithmic form is log k = log A - Ea/(2.303R) x 1/T, so a plot of log k against 1/T has a negative slope. With the usual positive 1/T intercept and negative log k intercept, the line extends through quadrants II and IV; students may choose a pair involving quadrant I by forgetting that the slope is negative.
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About Rate Constant
The rate constant, k, connects reaction rate with reactant concentrations in a rate law and has a value fixed for a particular reaction at a given temperature. Questions involve determining k from rate data, identifying its units for different reaction orders, and applying the Arrhenius equation to temperature changes.
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