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    Chemistry A-Level

    thermometer at the side arm

    What thermometer at the side arm means in Chemistry A-Level, as defined for AQA.

    Definition of thermometer at the side arm

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    Reference: AQA

    The thermometer bulb sits level with the side arm, where the vapour leaves, so it reads the temperature of the vapour being condensed rather than of the liquid.
    AQA · Elimination (study guide)

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