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ORCHIDS The International School

Changing of States of Matter

1) Have You Heard About Compressed Gases? Are They of Any Use to Us? If Yes, Give Examples for the Same.

Yes, compressed gases are used by us for various purposes.

  • LPG (Liquefied Petroleum Gas) used for cooking food is actually a mixture of gases that has been compressed into a liquid form.
  • CNG (Compressed Natural Gas) is used as fuel in vehicles.


2) Why Do We Not See Any Liquid Gas Coming Out of Stoves As Soon as We Open the Knob?

  • A gas is compressed using high pressure.
  • The cylinders in which the gas is filled maintain the same pressure.
  • As soon as the liquefied gas escapes the cylinder and reaches the stove, it changes into a gas due to a decrease in the pressure.
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