To predict the final temperature of a mixture of cups of water at different temperatures.

Part B: 32. Same reasoning.

Part C: 22. Same reasoning

Procedure:

Part A

1. Fill one-cup ¾ full with cold water from the pail. Mark the water level along the inside of the cup. Pour the water in the cup into a second cup. Mark it as you did the first one. Repeat for cup 3.
2. Fill the first cup to the mark with hot water from the pail. Measure and record the temperature of both cups of water.
3. Predict the temperature if you mix the two cups of water in the liter container.
4. Pour the 2 cups into the liter container, stir and measure and record its temperature.
5. Empty the liter container.

Part B

1. Fill one cup to its mark with cold-water form the pail. Fill the other two cups to their marks with hot water from the pail. Measure and record their temperatures.
2. Predict what will be the temperature when all three cups of water are mixed in one container.
3. Pour the three cups of water into the liter container, stir the mixture and measure and record its temperature.
4. Empty the liter container.

Part C

1. Fill one cup to its mark with hot water. Fill the other two cups to their marks with cold water. Measure and record their temperatures.
2. Record your prediction of the temperature when these cups of water are mixed in one container.
3. Pour the three cups of water into the liter container, stir the mixture, and measure and record its temperature.
4. Empty the liter container.

Data/Analysis

Conclusion: My hypothesis turned out to be correct. I had hypothesized that the hotter water will lose energy to the colder water. This would result in the hotter waters temperature to lower and the colder water temperature to rise. This proves that heat energy travels from a hotter substance to a colder one. When two liquids, the same substance with different temperatures, are mixed together, the final temperature will be between the two temperatures of the waters. This final temperature will depend on the amount of energy mixed together. If more hot water, which has more energy than cold water, is mixed with less cold water, then the final temperature will be closer to the initial temperature of the hot water than to the initial temperature of the cold water.