Table of Thermodynamics

Thermodynamics (4E): Gas Law

Lecture Demonstrations

Entropy and the Second Law

PIRA classification 4F

Grayed Demos are either not available or haven't been built yet.

4F10. Entropy

PIRA #

Demonstration Name

Abstract

4F10.00

Entropy

4F10.10

time reversal

4F10.10

time reversal

An ink column in glycerine between two concentric rotating cylinders appears to mix and unmix.

4F10.10

unmixing demonstration

The area between coaxial cylinders is filled with a Newtonian fluid and a suitable tracer. When the inner cylinder is rotated, the tracer appears to be mixed but is distributed in a fine one armed spiral sheet. Reversing the direction of inner cylinder rotation will cause the original tracer pattern to reappear.

4F10.10

order and disorder

Ink seems to be mixed in glycerine but can be unmixed.

4F10.10

un-mixing

Glycerine between two concentric cylinders. Animation.

4F10.11

capacitor charging entropy change

A simple demonstration-experiment that measures the difference in change of temperature due to charging a capacitor in many steps or one step.

4F10.20

balls in a pan

4F10.20

balls in a pan

Three red balls and three yellow balls are mixed in a pan.

4F10.25

communication time and entropy

Demonstrate entropy with the time it takes a student to communicate the structure of ordered and disordered playing cards, and a salt crystal model, etc.

4F10.30

Hilsh tube

4F10.30

Hilsh tube

4F10.30

Hilsch tube

The Hilsch tube is a sort of double vortex that separates hot and cold air.

4F10.40

dust explosion

4F10.40

dust explosion

4F10.40

dust explosions

Disperse dust in a can with a squeeze bulb and use a spark to set off the explosion.

4F10.40

dust explosion

Blow a teaspoon of lycopodium powder into a covered can that contains a lighted candle inside.

4F10.40

dust explosion

Blow lycopodium powder into a can containing a candle.

4F10.45

gas explosion

Fill a can that has a hole on top and bottom with illuminating gas and light the top hole. The flame burns low and then the can explodes.

4F30. Heat Cycles

PIRA #

Demonstration Name

Abstract

4F30.00

Heat Cycles

4F30.01

Hero's engine

see 3C55.35

4F30.01

drinking bird

see 4E31.20

4F30.10

Stirling engine

Show both a working stirling engine and a cutaway model.

4F30.10

Stirling engine

Show both a working Stirling engine and a cutaway model.

4F30.10

Stirling hot air engine

A Stirling hot air engine.

4F30.10

hot air engine

Pictures and diagram of a hot air engine that can be run as a hot or cold engine or driven both ways.

4F30.10

Stirling engine

Shows the standard Stirling engine, includes good animation.

4F30.11

the stirling engine explained

An explanation of how the Stirling engine works. Good diagrams. (We had to machine off the top half of one to convince the faculty)

4F30.20

steam engine

4F30.20

steam engine

A small steam engine runs from a small alcohol lamp.

4F30.20

steam engine

A small steam engine powers a small electric generator.

4F30.22

room temperature steam engine

Place an inflated balloon on the end of a capped copper tube and immerse the tube in liquid N2. Place a weight the collapsed balloon and it will rise when the balloon warms up.

4F30.25

Liquid nitrogen engine

Convert a small steam engine to run on liquid nitrogen.

4F30.25

liquid air steam engine

Run a model steam engine by connecting a test tube of liquid air to the boiler.

4F30.30

Hilsh tube

4F30.30

Hilsh tube

4F30.31

model steam engine

Picture of a model steam engine.

4F30.35

compressed air engine

The parts of a steam engine that runs on compressed air.

4F30.40

refrigerator

4F30.50

engine models

Models of different engines are shown.

4F30.52

model gasoline engine

A picture of a model gasoline engine.

4F30.55

air/ocean uniform temperature engine

An experimental engine that shows that it is possible to extract heat from a nonhomogeneous uniform temperature reservoir. The humidity must be less than 100% as evaporative cooling is used.

4F30.56

ratchet and pawl model

Use of a ratchet and pawl model to discuss the second law. Diagram, Construction details in appendix, p.1287.

4F30.60

Nitinol engine

4F30.60

Nitinol engine

4F30.60

Nitinol engine comments

Comments on AJP 52(12),1144 taking issue with several points.

4F30.60

Nitinol engine

Short thermodynamic discussion of the Nitinol engine.

4F30.70

rubber band engine

4F30.70

rubber band motor

A wheel with rubber band spokes turns when heated locally with a spotlight.

4F30.70

rubber band motor

The spokes of a bicycle wheel are replaced with rubber bands and a heat lamp is focused on one area causing the bands to contract at that point. Pictures.

4F30.71

rubber band motor thermodynamics

An analysis of the thermodynamics of a simple rubber band heat engine.

4F30.76

optimizing the rubber-band engine

An appropriate choice of dimensions maximizes the torque of an Archibald rubber-band heat engine. Plenty of analysis.

4F30.90

Buchner diagram extensions

Comments extending the Buchner diagram to irreversible systems.

4F30.91

Bucher diagrams

A new diagram of the Carnot cycle to replace the pipeline diagram.

4F30.95

Carnot cycle diagrams

A set of thirty different Carnot cycle diagrams.

Demonstrations

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