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The Clausius Clapeyron Equation The Clausius-Clapeyron Equation is used to calculate the vapor pressure at another temperature if the vapor pressure is known at some temperature. ln(P2/P1) = ΔH/R(1/T1 – 1/T2) P1 & P2 – mmHg, T1 & T2 – K, R – 8.314J/mol.K , ΔH = J/mol Note that no pressure is given with […]
Raoult’s Law Of Non-Volatile Solute For Concentrated Solution Problem: The relative lowering of vapor pressure produced by dissolving 71.5g of a substance in 1000g of water is 0.00713. The molecular weight of the substance will be: P0 – Ps/P0 = n/(n + N) Or P0 – Ps/P0 = w/m/(w/m + W/M) n – moles of […]
Raoult’s Law Of Non Volatile Solutes For Dilute Solution Problem: Calculate the vapor pressure of the solution containing 35.5g of glucose (C6H12O6) per 100g of water at 25˚C. The vapour pressure of water at 25˚C is 23.75mmHg. (Molar mass of C6H12O6 = 180.16g/mol) Solution: Apply the formula: P0 – Ps/P0 = n/N Or P0 – […]