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HESI ChemistryPressure, volume, temperature

Gas LawsHESI A2 cheat sheet

Pressure, volume, temperature

7 key facts Reviewed Oct 2026
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Boyle'S Law

  • P₁V₁ = P₂V₂ at constant temperature
  • Pressure and volume are inversely related

Charles'S Law

  • V₁/T₁ = V₂/T₂ at constant pressure
  • Volume and temperature are directly related

Combined & Ideal

  • P₁V₁/T₁ = P₂V₂/T₂
  • PV = nRT

Critical

  • Temperature must be in kelvin — K = °C + 273
Key takeaway

Pressure, volume, temperature

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