Pour a liter of water at 40 degrees C into a liter of water at 20 degrees C and the final temperature of the two becomes

Question

Quizplus · Accepted Answer

When the two liters of water are mixed, the warmer water will transfer some of its heat energy to the cooler water until they reach an equilibrium temperature. Since the starting temperatures are 40 degrees C and 20 degrees C, the final temperature will be the average of the two, which is 30 degrees C. Therefore, the best choice is B, at or about 30 degrees C.

Pour a Liter of Water at 40 Degrees C into a Liter