2024-03-21T09:30:50+03:00[Europe/Moscow] en true <p>Exothermic transfer...</p>, <p>2 examples of exothermic reaction</p>, <p>Exothermic the surroundings get hotter/colder</p>, <p>2 uses of exothermic</p>, <p>Endothermic transfer...</p>, <p>Endothermic the surroundings get hotter/colder</p>, <p>Temp change practical</p> flashcards

Chemistry Paper 1 - Energy Changes

CHEMISTRY PAPER 1

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  • Exothermic transfer...

    Transfer from reacting molecules to surrounding

  • 2 examples of exothermic reaction

    Neutralisation and combustion reactions

  • Exothermic the surroundings get hotter/colder

    hotter

  • 2 uses of exothermic

    Hand warmers and self heating cans

  • Endothermic transfer...

    Takes in energy from surrounding

  • Endothermic the surroundings get hotter/colder

    colder

  • Temp change practical

    Pour dilute acid into a polystyrene cup which is standing in a beaker (to stop falling over). Use a thermometer to measure temperature and record it. Add 5cm cubed of sodium hydroxide solution into the polystyrene cub. Fit a plastic lid on the cup and make a hole for the thermometer. Gently swirl. Record highest temperate reach. then repeat with higher sodium hydroxide