Before a chemist can combine a solution with other liquids in a labratory, the temperature of the solution must be between 39C and 52C. The chemist places the solution in a warmer that raises the temperature 6.5c per hour. If the temperature is origionally 0C, how long will it take to raise the temperature to the necessary range of values?

Question

Mcdaniel

Chemistry

7 November, 09:49

Before a chemist can combine a solution with other liquids in a labratory, the temperature of the solution must be between 39C and 52C. The chemist places the solution in a warmer that raises the temperature 6.5c per hour. If the temperature is origionally 0C, how long will it take to raise the temperature to the necessary range of values?

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Answers (1)

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Jocelyn Fry · Answer 1

6 hr 6 min

Explanation:

The minimum amount of time necessary is the time it takes to raise the temperature to 39C from 0C (a difference in temperature of 39C). At a rate of 6.4C/hr, the time necessary to change the temperature by 39C is:

(39C) / (6.4C/hr) = 6.09375 hr

Expressed in hours and minutes, this time is 6 hr and 0.09375 hr, or:

(0.09375 hr) (60min/hr) = 5.6 minutes

Therefore, at 6 hr and 6 min of heating, the solution will be within the necessary range.