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Does Hot Water Freeze Faster Than Cold Water?

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Kari H.

on 26 November 2013

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Transcript of Does Hot Water Freeze Faster Than Cold Water?

I.B. Prep 3 by Kari Holm
Does Hot Water Freeze Faster Than Cold Water?

I.B. Prep 3 - Kari Holm
Control group
- Room temperature water.
Dependent Variable
- Time it takes the water to freeze.
Independent Variable
- Temperature of the water.
Warm water: For the sake of the experiment 80 degrees F
Cold water: For the sake of the experiment 60 degrees F
Ice-Cube trays
measuring cups
toothpicks optional

In conclusion, my hypothesis was ( ), because the () water froze faster than () water.
Water has a freezing point of 32 degrees F.
Room temperature is normally around 70 degrees F.
Water begins to boil at 212 degrees F.
Water expands upon freezing.
Water is a hydrogen bond (the attraction between a hydrogen atom with a partial positive charge and another atom with a partial negative charge.)
Water has a high heat capacity.
Miller & Levine Biology textbook

1. First you will measure equal amount of cold and warm water in separate cups.
2. Next, test the temperature of the two waters to make sure they are at the set standard.
3. Pour the two types of water in separate ice-cube trays preferably making one tray different from the other to not get the water types confused.
4. Place the trays into a cold environment such as a freezer where you can observe the water and immediately start the timer.
5. Checking constantly use toothpicks to test the water to see if they are frozen. A thermometer will give you a more accurate reading.
6. When the water is frozen record the time and wait for the rest of the results.
7. Repeat steps 1-6 four more times and record your data.

Some possible outcomes: The cold water will freeze first followed by warm water, or the warm water will freeze first followed by the cold water.

In a chart or graph (bar) you would record the time it took the specific water to freeze to 32 degrees F.

Hypothesis: If water is already cold, then it will freeze faster than warm water.
In the conclusion I would start it off as the above. I would restate some of the information from the introduction and then analyze and connect it with what occurred in the experiment. I would make a real life connection and talk about possible mistakes made as well as why my result was what it was.
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