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Raising agents - Coggle Diagram
Raising agents
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how does steam work?
Steam (or water vapor) is produced when water is heated to a high temperature and it will cause a mixture to expand and rise. Steam can expand to up to 1600 times its size so is an effective raising agent.
In water (H2O) the molecules are joined together by hydrogen bonds. When water is heated to 100 degrees Celsius the hydrogen bonds slowly begin to snap and its molecules of H2O start to break free and go into the air as steam.
This happens because when the hydrogen bonds break the water molecules move away from each other very quickly and form steam.
What is a raising agent?
A raising agent is used to release air bubbles (carbon dioxide or/and steam) which then cause the mixture, batter or dough to expand upwards and outwards when it reacts with heat, moisture or acid.