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

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Introduction

Purpose: To predict the final temperature of a mixture of cups of water at different temperatures. Background info: 1) Temperature: quantity that tells how hot or cold something is compared to a standard. 2) Heat: Energy that is in transit from a body of higher temperature to one of lower temperature. Materials: 1) 3 Styrofoam cups 2) Liter container 3) Thermometer (Celsius) 4) Pail of cold water 5) Pail of hot water Hypothesis: Part A: I predict the temperature will be 26 when the to cups are mixed. The colder water will rise and the hotter water will lower in temperature because the hotter water will lose heat to the colder water. ...read more.

Middle

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. ...read more.

Conclusion

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. ...read more.

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