Chemistry

10th

grade

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ENERGETICS

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10 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt
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    The energy level diagram for the reaction between magnesium and hydrochloric acid is shown.

    Energy is given out during the reaction

    The products are at a lower energy level than the reactants

    The reaction is endothermic.

  • 2. Multiple Choice
    30 seconds
    1 pt

    Which reaction is endothermic?

    acid neutralising alkali causing a temperature increase

    adding magnesium to hydrochloric acid

    calcium carbonate decomposing when heated combustion of fossil fuels

  • 3. Multiple Choice
    30 seconds
    1 pt

    Which statements about exothermic and endothermic reactions are correct?

    During an exothermic reaction, heat is given out

    The temperature of an endothermic reaction goes up because heat is taken in

    Burning methane in the air is an exothermic reaction

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