Question

every increase of 20 ° C, the reaction rate becomes 3 times faster than the original. If the reaction temperature is 20 ° C lasts for 9 minutes, the reaction occurs at a temperature of 80 ° C takes......minutes

Answer 1

At 20 deg C, the reaction lasts 9 minutes.
For every 20 deg C of temperature increase, the reaction is 3 times faster, so the reaction takes 3 times less time.
When the temperature goes from 20 deg C to 40 deg C, the reaction becomes 3 times faster.
From 40 deg C to 60 deg C, the reaction is again 3 times faster than at 40 deg C, so it's now 9 timers faster than at 20 deg C.
From 60 deg C to 80 deg C, the reaction becomes again 3 times faster than at 60 deg C, so now it's 27 times faster than at 20 deg C.
Since at 20 deg C, the reaction took 9 minutes, at 80 deg C, the reaction will be 27 times faster and will take 27 times less time.
What is 9 minutes divided by 27?
9 minutes = 540 seconds
(540 sec)/27 = 20 sec
20 sec or 1/3 minute