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The Reduced Specific Volume calculator computes the reduced volume(vr), which is the ratio of the specific volume of a substance to the value of the specific volume at the critical point.
INSTRUCTIONS: Choose the preferred units and enter the following parameters.
- V - the actual measured volume
- Tcr - the critical temperature point for the substance
- pc - the critical pressure for the substance
Reduced Specific Volume(vr): The volume (vr) is returned in moles. However, this can be automatically converted to other volume units via the pull-down menu. The Reduced Specific Volume is computed using the universal gas constant (R) which is 8.3144598(48) (m³ • Pa) / (K• mol).
The Math / Science
The reduced properties of a fluid are a set of state variables normalized by the fluid's state properties at the fluid's critical point.1
The reduced specific volume is the ratio of the specific volume of a substance to the value of the specific volume at the critical point.
Chemistry Calculators
- R - Gas Constant: 8.3144626181532 J/(K⋅mol)
- Boyle's Law Calculator: P1 • V1 = P2 • V2
- Charles Law Calculator: V1• T2 = V2 • T1
- Combined Gas Law Calculator: P•V / T= k
- Gay-Lussac Law: T1•P2 =T2•P1
- Ideal Gas Law: P•V = n•R•T
- Bragg's Law: n·λ = 2d·sinθ
- Hess' Law: ΔH0rxn=ΔH0a+ΔH0b+ΔH0c+ΔH0d
- Internal Energy: ΔU = q + ω
- Activation Energy: Ea = (R*T1⋅T2)/(T1 - T2) ⋅ ln(k1/k2)
- Arrhenius Equation: k = AeE_a/(RT)
- Clausius-Clapeyron Equation: ln(P2/P1) = (ΔHvap)/R * (1/T1 - 1/T2)
- Compressibility Factor: Z = (p*Vm)/(R*T)
- Peng-Robinson Equation of State: p = (R*T)/(Vm - b) - (a*α)/(Vm2 + 2*b*Vm - b2)
- Reduced Specific Volume: vr = v/(R* Tcr / Pc)
- Van't Hoff Equation: ΔH0 = R * ( -ln(K2/K1))/ (1/T1 - 1/T2)
