FWS asked in Science & MathematicsChemistry · 4 months ago

Explain the reason you should always measure your tire pressure when the tire is cold.?

In direct relationship with the gas law you have demonstrated in the experiment of PRESSURE - TEMPERATURE RELATIONSHIP IN GASES. Explain this using the concepts of molecular velocity and collision of molecules.

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  • 4 months ago

    Molecular velocity, collision of molecules, and Gay-Lussac's law have nothing to do with why "you should always measure your tire pressure when the tire is cold".

    You should always measure your tire pressure when the tire is cold because the tire manufacturer specifies the recommended tire pressure at ambient temperature.

  • y
    Lv 7
    4 months ago

    When you take a football and leave it out in the almost freezing temps for 3 hours, the air will contract resulting in lower pressures.  When you then take them into the locker room and allow them to sit in that 70 degree temp for a couple of hours. The air will warm, expand, and result in greater pressures. Blow up a balloon and put it in the fridge for a few hours, see what happens.

  • Jim
    Lv 7
    4 months ago

    The real issue is sidewall flex and failure with a full load. Too low of pressure and full load can ruin the tire. And since the ambient temperatures can vary widely (think Alaska winter vs Arizona summer), you want the tire to be properly pressurized for the load and current temperature.

  • Dze
    Lv 7
    4 months ago

    mainly the manufacturer of the rubber has to have a consistent way to set maximum pressure so the tire wont fail ..

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  • Anonymous
    4 months ago

    Tires actually are considered properly filled based on the volume of air present in the tire. The pressure is the only way to determine if that volume is correct. Once the tires become heated and the pressure increases you can no longer be certain that the volume of air is correct or not. If you're driving in cold weather and the volume of air is low the tires will wear incorrectly as well as not perform as designed which can actually be a hazardous condition.

  • 4 months ago

    Because gases expand when hot, 

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