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Charles's Law
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Parameters
Pressure P₁ (bar)
Pressure P₂ (bar)
Amount n (mol)
Key Concepts
•
Charles's Law
: at constant pressure, V ∝ T (temperature in Kelvin)
• Lines extrapolate to
V = 0 at T = 0 K
— this defines absolute zero
• T(K) = T(°C) + 273.15; always use Kelvin in gas law calculations
• Higher pressure → smaller volume at the same temperature (lower isobar)
• Combined with Boyle's Law gives the ideal gas equation PV = nRT
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