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Cloud Formation in a Bottle

Sun, 29/08/2010 - 10:45 — mnd22
Introduction
Demonstrate cloud formation as air pressure drops.
Explanation
Explanation: 

A smoking (recently blown-out) match is dropped into a lemonade bottle containing a little water. The bottle is closed and then squeezed, held for a few moments, and released. Water condenses on the nucleation points provided by the smoke as the air pressure drops and temperature falls slightly.

Risk Assessment
Date risk assesment last checked: 
Mon, 02/01/2012
Risk assesment checked by: 
mnd22
Risk Assessment: 

Strike a match, extinguish it and drop it into a bottle containing a little water.

Risks

1. Using matches - possibility of burns.

2. If lit match is dropped on something flammable there is a small risk of fire.

Control Measures

1. Ensure that matchbox is not available to be grabbed by children.

Demonstrator to strike matches away from self but also to take care not to strike immediately towards visitors.

Ensure match is no longer lit when dropped into bottle.

Have a cup (or similar) of water to hand to take matches which might be lit and not used.

2. Keep flammable materials away from matches.

Have a fire extinguisher available.

In case of accident

1. Run burns under cold water for at least 10 minutes.

Contact a first aider.

2. Fight fire if safe to do so.

If fire gets out of control evacuate area and call 999.

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Comments

Wed, 26/01/2011 - 22:53 — ak570

RA checked 26/01/11

RA checked 26/01/11

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