The change in temperature per hour for the 6 hours is -3°.
According to the question
The temperature changed steadily over the 6 hours, which means that it changed the same amount of degrees every hour.
Subtract the final temperature from the starting temperature to find the difference, we get only change in temperature.
Change in temperature per hour = Q / t to calculate the change in temperature from a specific amount of heat added.
It changed -18 degrees in 6 hours.
We get change in temperature per hour for the 6 hours by dividing the temperature change by the number of hours.
-18 ÷ 6 = -3
Hence,
The change in temperature per hour for the 6 hours is -3°.
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