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Laten Heat of Fusion Physic 20 IB Lab

Extracts from this document...

Introduction

                dan Stoica

                October 12th, 2009

Latent Heat of Fusion

Problem:How does water temperature affect the latent heat of fusion?

Variables:The Manipulated is the water temperature.
The Responding variable is the latent heat of fusion.
The controlled variables are the mass and volume of the ice cube, the mass and volume of the water, room temperature, and the initial temperature of the ice cube.

Variables will be controlled by: using the same kind of ice cube from the same freezer. Using a measuring cup to have the same amount of water every time. Keeping the furnace at a constant 22 degrees Celsius.

Materials:

  • Measuring cup
  • Ice cube
  • Water
  • Thermometer

Procedure:

  1. Prepare 1 cup of room temperature water(22°C)
...read more.

Middle

Initial Temp of Ice Cube(±0.05°C)

Final Water Temp(±0.05°C)

-10.75

17.80

-10.75

9.6

-10.75

9.7

Mass of Water

0.236 Kg

Mass of Icecube

0.010 Kg

Processing Raw Data:
Calculations for Latent Heat of Fusion at 22°C(all temperatures converted to °K)

        Q
water=mwcw(295°K – 290.8°K)

Qice=miceL        + micecw(290.8°K – 273°K) + miceCice

...read more.

Conclusion

Improving:

An electronic and more accurate thermometer could be used. The temperature of the ice cube could be measured inside the freezer to prevent it from heating, and then immediately placed into the cup of water. When heating the water to the desired temperature, an accurate device and thermometer should be used to get the water to exactly the necessary temperature.

Page  of

...read more.

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