Thermal Anomaly of Water, Leybold Products

Supplier: Leybold

Thermal Anamoly of Water

Thermal Anamoly of Water

C1.3.3.1

470311-226EA 4694.89 USD

470311-226

Thermal Anomaly of Water, Leybold Products

Educational Materials Chemistry Educational Materials Properties of Matter Learning Activities in Chemistry

Leybold Chemistry Experiments.

Material properties
Chemical reactions and stoichiometry
Water decomposition
Water synthesis

Water has a density anomaly: up to a temperature of 4 °C, water has a negative coefficient of expansion, i.e., it shrinks when warmed. After passing through zero at 4 °C, the coefficient of expansion becomes positive. So the density of water reaches a maximum at 4 °C.

In experiment C1.3.3.1, the density maximum of water is proven by measuring its expansion in a vessel with a riser. Starting from room temperature, the complete setup is cooled down in an ice water bath to about 1 °C under constant stirring, or after cooling in a freezer, it is warmed slowly by the ambient temperature. The level h, in a riser with a cross-sectional area A is measured as a function of the water temperature ϑ. Because the change in volume relative to the total volume V0 is small.

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