• Question: is spray deodorant a gas or a liquid?

    Asked by Klaudia_23_x to Hummy, Lewis, James, Sandra on 14 Mar 2017.
    • Photo: Lewis Wright

      Lewis Wright answered on 14 Mar 2017:

      Deodorants (and aerosol cans generally) are gasses, however when the cans they are in are filled up they are under such high pressure that they are forced together into a liquid. As you press the top to spray some of it, it rushes up the tube where there is less pressure, and it becomes a gas again.

      This is also why cans get cold when you spray them – as the liquid expands back into a gas it needs energy to do so and sucks heat out of the can and air around it 🙂

    • Photo: James Martin

      James Martin answered on 15 Mar 2017:

      it’s a pressurised liquid. there’s a gas in there to help maintain the pressure (otherwise it wouldn’t spray), but the smelly stuff is a fluid.

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