Measurement on Supercooled Water. |
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The temperatures of supercooled water
measured with a TempLabs.com T2 thermometer. |
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Sensor1 = |
Modal mineral water |
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no CO2. |
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Supercooled
down to |
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-5.12 |
°C |
Freezing point
depression |
-0.0220 |
°C |
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Sensor2 = |
Loka bottled water |
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with some CO2. |
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Supercooled
down to |
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-5.41 |
°C |
Freezing point
depression |
-0.1761 |
°C |
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Water below zero but not frozen. |
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When freezing
starts the phase transition heatflow is very large: |
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The bottle
temperature change 5°C in less than 10 s. Heat released is 10 kWs. Heatflow during 20s is 500W. |
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(The
soft on set is not measured, it is caused by curve fitting made by Excel.) |
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Freezing point
depression caused by minerals: |
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-0.022 |
°C |
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Freezing point
depression caused by CO2 (and minerals): |
-0.176 |
°C |
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Partly frozen water. |
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Measurement data during freezing: |
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H2O+minerals |
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H2O+CO2 |
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-0.0218 |
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-0.1762 |
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-0.0217 |
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-0.1761 |
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-0.0222 |
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-0.1764 |
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-0.0216 |
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-0.1758 |
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-0.0221 |
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-0.1766 |
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-0.0220 |
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-0.1765 |
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-0.0219 |
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-0.1761 |
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-0.0217 |
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-0.1762 |
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-0.0220 |
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-0.1763 |
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-0.0218 |
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-0.1764 |
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-0.0224 |
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-0.1760 |
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-0.0220 |
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-0.1761 |
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-0.0220 |
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-0.1755 |
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-0.0220 |
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-0.1763 |
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-0.0221 |
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-0.1761 |
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-0.0218 |
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-0.1760 |
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-0.0221 |
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-0.1761 |
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-0.0222 |
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-0.1761 |
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-0.0220 |
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-0.1761 |
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-0.0222 |
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-0.1760 |
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-0.0221 |
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-0.1762 |
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-0.0220 |
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-0.1758 |
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Average |
-0.0220 |
°C |
Average |
-0.1761 |
°C |
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