Energy Change of Reactions
What are exothermic and endothermic reactions, and how do they differ?
CURRICULUM
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The Energy of Formula 1
The energy-converting engine that powers Formula 1 cars round the track.
CONTEXT
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Endothermic Reaction
We demonstrate an endothermic reaction by mixing hydrated barium hydroxide with ammonium thiocyanate.
Experiment
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Burning Bubbles
We investigate the properties of bubbles of methane gas and bubbles of the gas we breathe out.
Experiment
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Elephant's Toothpaste
We create a rapidly expanding column of foam by mixing chemicals.
Experiment
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Leaf Chromatography
We separate the different pigments in a beech leaf using chromatography.
Experiment
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Elements vs Alloys
We compare melting points of lead and tin to the melting point of their alloy, solder.
Experiment
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Instant Crystals
We use a supersaturated solution of sodium ethanoate to demonstrate instant crystallisation.
Experiment
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Iron and Luminol
We use potassium ferricyanide and luminol indicator to show how forensic scientists detect blood at crime scenes.
Experiment
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Metal Extraction
We extract copper metal from copper chloride solution using electrolysis.
Experiment
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Flame Test
We use a Bunsen burner to burn different chemical salts to see how the flame colour changes.
Experiment
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Underwater Volcano
We create an underwater volcano by placing a conical flask of hot coloured water in a tank of cold water.
Experiment
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Measuring Food Energy
We investigate the amount of energy stored in maize snacks and peanuts by burning them.
Experiment
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Screaming Jelly Baby
We add a jelly baby to a boiling tube containing potassium chlorate.
Experiment
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Dry Ice and Magnesium
We use magnesium and blocks of dry ice to show how a redox reaction occurs.
Experiment
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