5. Which of the following statements regarding the difference between an average

Question

5. Which of the following statements regarding the difference between an average rate and an instantaneous rate is NOT correct? a. The average rate is taken over a larger time period. b· The instantaneous rate is taken from the slope ofthe curve at a specific time. c. They are not different if the time interval chosen is small enough. d· The instantaneous rate is always faster than the average rate. e. Both tend to decrease as the reaction proceeds. 6. The reaction CHCl)Cl)CCl(g)+ HCKg) has the following rate law: Rate A(CHC ICJ. If the concentration of CHCl, is increased by a factor of five while the concentration of Cl, is kept the same, the rate will a. double b. triple. c. stay the same. d. increase by a factor of five. e. decrease by a factor of one-fifth. 7. Given the following data, determine the order of the reaction with respect to Ha 2 HC) Rate (Mis) Experiment IH:l (torr) 250 250 IICII (torr) 325 81 325 1.34 0.331 0.266 a. one-half b. second c. first third three-halves d. e, 8. Determine the overall order of the reaction 2 NOG) + Club 2 Noce) from the following data Experiment INOI (M) 0.0300 0.0150 0.0150 Clal (An 0.0100 0.0100 0.0400 Rate (M/s) 3.4 × 10 8.5 × 10-5 3.4 x 104 a. first b. second c. third d. three-halves e. fourth 9. Ifthe reaction 3 A +B+SC-+ 2 D + E is first order overall, which ofthese could be the units of its rate constant, k? b. Mis CVMEs e. Ms 10. Indicate which of the following plots would be obeained for a second-order reaction. IMA] I/[A] sec) sec)

Explanation / Answer

5)

instantaneous rate and average may have any value.

It can’t be generalised that instantaneous rate is faster than average rate

Answer: d

rest all seems correct

6)

order of CH2Cl2 is 1

so, making [CH2Cl2] 5 times, will make the rate go 5 times FASTER

Answer: d

Only 1 question at a time please

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