The affect of adding hot water to cold water on the temperature By: Sarah Fothergill Brodey Wambold.

The affect of adding hot water to cold water on the

temperature

By:

Sarah Fothergill

Brodey Wambold

Purpose and Hypothesis

• Purpose- To see if adding different temperatures of hot water affects the temperature of really cold water, when mixed together.

• Hypothesis- The temperature will increase slowly as the amount of hot water increases.

Independent Variable, Levels and Dependent Variable

• Independent Variable- Time (Minutes)

• Levels-

• Dependent Variable- Temperature (Degrees Celsius)

0

Control

2 4 6

2

Trials

2 2 2

Constants

• The amount of water started with.

• The amount of water added.

• Both of the beakers.

• The type of water.

• The burner and burner stand.

• The lab equipment.

Procedure Get lab equipment out as followed.

Thermometer Graduated CylinderTemperature Sensor Computer Alcohol Burner Alcohol Burner stand

2 Beakers

1. Set up the lab. 2. Measure 50 mL. of cold water. 3. Measure 50 mL. of tepid water.4. Put beaker 2 on the burner stand. 5. Pour the water into beaker 1 and pour the tepid water into beaker 2. 6. Light the alcohol burner. 7. Every 2 minutes add 10 mL. of the hot water. 8. Record your data onto a table. 9. After completing 2 trials clean up the lab.

ResultsTime (min.) Trial 1

temperature of water added (Degrees Celsius)

Trial 1 temperature of water

(Degrees Celsius)

Trial 2 temperature of water added (Degrees Celsius)

Trial 2 temperature of water added (Degrees Celsius)

The Starting temperature of the water

(Degrees Celsius)

0 None added 7.1 None added 4.6 27.4

2 29.1 28.2 50.2 28.3 41.9

4 81.4 43.4 86.2 44.3 27.8

6 50.2 28.3 101 52.3 43.7

Conclusion

• The temperature was at highest 101 degrees Celsius for both trials.

• The temperature was at lowest 29.1 degrees Celsius for both trials.

• The temperature of the water after the hot water was added was at highest 52.3 degrees Celsius and at lowest 4.6 degrees Celsius.

Conclusion

• The hypothesis was correct because as hot water was added the temperature did increase as we had said.

• This happened because hot water has more thermal energy than the tepid water.

Conclusion

• As thermal energy was being transferred to the cold water the particles of the hot water that was added slowed down.

• The particles of the cold water sped up.

• This is a process called thermal equilibrium.