Monday, 30 June 2014 10:49
I4-35: LOWERING THE FREEZING POINT OF WATER USING SALT
Additional Info
- ID Code: I4-35
- Purpose: Demonstrate that the freezing point of water can be reduced by putting ice in a salt water bath.
- Description: The temperature of an ice and water mixture is measured with a digital thermometer. Adding salt to the icewater mixture reduces its temperature. The thermometer can be used to stir the mixture. By this technique the freezing point can be lowered as much as 15 degrees celcius.
- Availability: Available
- References: REFERENCES: (PIRA unknown.)
- Loc codes: I4
Published in
I4 Changes of State
-
I4-01: PVT PHASE DIAGRAMS FOR CO2 AND H2O
Three-dimensional PVT phase diagram models. Read More
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I4-02: PVT SURFACE - TRANSPARENT
Illustrate aspects of phase transitions. Read More
-
I4-03: LATENT HEAT - ICE TO WATER TO STEAM
Illustrate aspects of phase transitions. Read More
-
I4-11: BOILING AT REDUCED PRESSURE
Demonstrate that water boils at a lower temperature under reduced pressure. Read More
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I4-12: BOILING WATER BY PUMPING
Demonstrate water boiling under reduced pressure. Read More
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I4-13: CHANGE OF STATE OF LN - POPPING CAN LID
Show the increase in volume which accompanies the transition from liquid to gaseous nitrogen. Read More
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I4-14: CHANGE OF STATE WITH BANG
Show the increase in volume which accompanies the transition from liquid to gaseous nitrogen. Read More
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I4-15 CONDENSATION OF STEAM - GALLON CAN COLLAPSE
Illustrates forces produced by the pressure drop when steam condenses into water
Read More
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I4-16: DRINKING BIRD
Illustrates forces produced by the pressure drop when steam condenses into water
Read More
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I4-17: AIR BALLOON ON LIQUID NITROGEN
Demonstrate dramatically that the volume of vapor is greater than the volume of the same amount of liquid. Read More
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I4-18: PULSE GLASS
Illustrate change of phase between liquid and vapor in an confined fluid. Read More
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I4-19: CONDENSATION OF STEAM - SODA CAN COLLAPSE
Surprising demonstration using condensation of steam. Read More
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I4-31 ICE BOMB
Demonstrates forces created by freezing water
Read More
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I4-32: FREEZING WATER BY PUMPING
Freeze water by reducing the ambient pressure. Read More
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I4-33: CRYOPHORUS
Illustrate freezing caused by cooling by evaporation. Read More
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I4-34: HAND WARMER
Demonstrate the heat of fusion. Read More
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I4-35: LOWERING THE FREEZING POINT OF WATER USING SALT
Demonstrate that the freezing point of water can be reduced by putting ice in a salt water bath. Read More
-
I4-36: REGELATION - ICE UNDER PRESSURE
Demonstrate regelation. Read More
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I4-51: SUBLIMATION OF DRY ICE - PROJECTION
Demonstrate sublimation of carbon dioxide (dry ice) from a solid into a gas. Read More
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I4-52: CARBON DIOXIDE BALLOON ON LIQUID NITROGEN
Demonstrate condensation sublimation. Read More
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I4-61: BINARY PHASE TRANSITION - CRITICAL OPALESCENCE
Show the behavior of a binary fluid as it passes through the critical temperature. Read More
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