Why does the pressure in the automobile tyres change during hot summer or winter season?

Monjur Alahi

Why does the pressure in the automobile tyres change during hot summer or winter season?


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Salim Ahmed Kawsar

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  • According to Gay-Lussac’s law, at constant volume, pressure of a fixed amount of a gas is directly proportional to its absolute temperature.
  • During hot summer, the temperature of automobile tyre increases faster. Consequently, the air inside the tyre gets heated and the gas molecules starts moving faster.
  • As the volume of the tyre remains constant, the pressure inside it increases.
  • During winter, the temperature of automobile tyre decreases. Consequently, the air inside the tyre gets cooled and the gas molecules starts moving much slower and the pressure inside the tyre decreases. 

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