GATE ChemE Calculator
Free Antoine equation calculator with step-by-step solutions — aligned with GATE 2025 Chemical Engineering paper.
Antoine Equation Calculator
log₁₀(P*) = A − B/(C+T) · GATE CH exam prep
Valid range: 26–104°C
Antoine Constants — log₁₀(P/mmHg) = A − B/(C + T°C)
Benzene (26–104°C)
A = 6.90565
B = 1211.033
C = 220.79
Water (1–100°C)
A = 8.07131
B = 1730.63
C = 233.426
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Moist air has an absolute humidity of 0.02 kg moisture/kg dry air at 1 bar. MW_water = 18, MW_air = 29. Using the Antoine equation for water, find the dew temperature.
T = B/(A − log₁₀P) − CFind the number of independent intensive variables needed to describe a ternary mixture at vapour–liquid–liquid equilibrium (VLLE: 1 vapour + 2 liquid phases).
F = C − P + 2500 mg adsorbent added to 100 mL of 100 mg/L phenol solution. Residual concentration after 5 h = 30 mg/L. Find phenol adsorbed per gram of adsorbent.
q = (C₀−Cf)·V / m_adsWater (70 kg/min) heated from 25°C to 65°C in counter-flow HX. Hot oil: 110°C in, 65°C out. U = 300 W/(m²·K). Find heat exchanger area.
A = Q / (U × LMTD)100 kg wet solid, initial moisture X₁=0.30, final X₂=0.02, critical Xc=0.10, equilibrium Xe=0.01 (kg/kg dry). Rc=10 kg/h·m², area=5 m². Find total drying time.
t = Ms(X₁−Xc)/(Rc·A) + Ms(Xc−Xe)ln[…]/(Rc·A)For laminar flow in a cylindrical pipe at constant volumetric flow rate, verify how pressure drop ΔP changes with viscosity, pipe length, and diameter.
ΔP = 128μLQ / (πd⁴)Capital cost (CC) of equipment varies with capacity (S) as CC ∝ S^β. The rule-of-thumb value of β is __ (six-tenths rule). Calculate new cost when capacity changes.
CC₂ = CC₁ × (S₂/S₁)^0.6