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Science Teaching Aids
Bird Drinking Heat Thermodynamics Demonstration
AUD 18.90(Ex GST)
AUD 18.90(Ex GST)
- Drinking bird apparatus for heat and thermodynamics demonstrations
- Demonstrates evaporative cooling and vapour pressure change
- Shows energy transfer using a visible tipping motion
- Useful for explaining evaporation, condensation and pressure difference
- Head cooling occurs as water evaporates from the bird’s fuzzy head
- Vapour pressure difference causes the liquid to move and the bird to tip
- Suitable for classroom physics and science demonstrations
- Useful for heat, energy and phase-change teaching activities
- Contains methylene chloride vapour as listed in the supplied explanation
- Handle carefully as a sealed demonstration apparatus
- Do not break, heat, puncture or modify the unit
- Use under appropriate laboratory or educational supervision
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- Description
Description
The Bird Drinking Heat Thermodynamics Demonstration, also known as a drinking bird heat engine demonstration, is designed to illustrate evaporative cooling, vapour pressure change, cyclic heat transfer and visible mechanical motion. It is suitable for school science laboratories, physics classrooms, chemistry classrooms, university teaching laboratories and supervised educational demonstrations. The demonstration begins when water evaporates from the fuzzy head. This evaporation removes heat from the head area, lowering its temperature and creating a visible link between evaporation and cooling. As the head cools, methylene chloride vapour inside the device condenses in the head section. This reduces vapour pressure in the head relative to the abdomen, creating a pressure imbalance within the closed system.
The pressure difference drives internal liquid movement toward the head. As liquid moves, the centre of mass shifts, causing the bird to tip forward. This tipping motion provides a clear visual demonstration of how heat transfer and pressure change can produce mechanical movement. As the bird tips, the cycle can repeat when the conditions are maintained. This makes the device useful for explaining evaporation, condensation, vapour pressure, energy transfer, centre of mass and cyclic thermodynamic behaviour in a simple classroom format. This product is intended for laboratory or educational settings only. It should be used under appropriate supervision, handled carefully and not opened, broken or misused. Users should follow suitable classroom safety procedures during demonstrations.
LabChoice Australia supplies Bird Drinking Heat Thermodynamics Demonstrations for school science departments, physics classrooms, chemistry classrooms, university teaching laboratories and educational demonstration environments. They are suitable for supervised thermodynamics lessons, heat transfer demonstrations, evaporation and condensation discussions, vapour pressure explanations and cyclic energy transfer activities.
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