Combined Gas Law Formula

Boyle's law states that PV is a constant. Charles law states volume is proportional to temperature. Gay-Lussac's Law states that pressure is proportional to absolute temperature. Combining these three laws we get combined gas law, which states "product of pressure and volume is proportional to temperature".

Combined Gas Law:

Gas Equation: PiVi/Ti = PfVf/Tf

Vi = Initial Volume,
Pi = Initial Pressure,
Ti = Initial Temperature,
Vf = Final Volume,
Pf = Final Pressure,
Tf = Final Temperature.

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The combined gas law is used in fluid mechanics, thermodynamics and in mechanism of air conditioner, refrigerator etc.,

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