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Gas law calculators solve Boyle's, Charles's, Gay-Lussac's, and the combined gas law for pressure, volume, and temperature relationships of ideal gases.
Công thức
PV = nRT (ideal gas law); P₁V₁/T₁ = P₂V₂/T₂ (combined gas law)
- P
- Pressure (atm/Pa)
- V
- Volume (litres/m³)
- n
- Moles of gas (mol)
- R
- Gas constant (0.0821 L·atm/(mol·K))
- T
- Temperature (Kelvin)
Hướng dẫn từng bước
- 1Boyle's law: P₁V₁ = P₂V₂ (constant T)
- 2Charles's law: V₁/T₁ = V₂/T₂ (constant P)
- 3Gay-Lussac's: P₁/T₁ = P₂/T₂ (constant V)
- 4Combined: P₁V₁/T₁ = P₂V₂/T₂
Ví dụ có lời giải
đầu vào
Boyle's: V₁=4L, P₁=2atm, P₂=4atm
Kết quả
V₂ = P₁V₁/P₂ = 2×4/4 = 2L
Câu hỏi thường gặp
When should I use ideal gas law vs combined?
Ideal: when n (moles) is constant or unknown. Combined: when gas amount is fixed, conditions change.
What temperature units should I use?
Always Kelvin (K = °C + 273.15) in gas law equations. Celsius and Fahrenheit don't work.
Is the ideal gas approximation accurate?
Good for most gases at normal conditions. Poor at high pressure or low temperature. Use van der Waals for precision.