Multiple choice

If 500 ml of water at 20oC is mixed with 500 ml of water at 40oC, what will be the temperature of the mixture?

  1. 20oC

  2. 40oC

  3. 60oC

  4. Between 20oC and 40oC
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D Correct answer
Explanation

Mixing equal volumes of water at different temperatures results in a final temperature that is the average of the two, assuming no heat loss. (20 + 40) / 2 = 30 degrees C, which is between 20 and 40.

AI explanation

When two identical volumes of water at different temperatures are mixed, the final temperature settles at the arithmetic mean of the two initial temperatures. The exact temperature would be the average of 20 degrees and 40 degrees, which is 30 degrees. Since 30 degrees falls between 20 and 40 degrees, the resulting mixture must have a temperature between 20oC and 40oC.

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