Calculate the vapor pressure of chloroform,CHCl₃(l),at 25°C.The standard free energies of formation of CHCl₃(l)and CHCl₃(g)are -71.84 and -70.12 kJ.mol^-1 at 25°C,respectively.

Question

Quizplus · Accepted Answer

The vapor pressure can be calculated using the Gibbs free energy change for the phase transition. ΔG = G(g) - G(l) = -70.12 - (-71.84) = 1.72 kJ/mol. Using ΔG = -RT ln(P), where R = 8.314 J/mol·K and T = 298 K, solve for P: P = e^(-ΔG/RT) = e^(-1720/(8.314*298)) ≈ 0.499 atm.

Calculate the Vapor Pressure of Chloroform,CHCl3(l),at 25°C

Calculate the Vapor Pressure of Chloroform,CHCl₃(l),at 25°C