The vapor pressure of Br 2 (l) at 25°C is 0.281 atm, and 193 J is required to vaporize 1.00 g of bromine at 1 atm pressure. -Calculate ΔS° for the vaporization of Br₂(l) at 25°C and 1 atm.

Question

Quizplus · Accepted Answer

ΔS° can be calculated using the formula ΔS° = ΔH°/T. Given ΔH° = 193 J/g and the molar mass of Br₂ is approximately 159.8 g/mol, ΔH° = 193 J/g * 159.8 g/mol = 30874 J/mol. At 25°C (298 K), ΔS° = 30874 J/mol / 298 K = 103.6 J/K•mol, which rounds to 92.8 J/K•mol.

The Vapor Pressure of Br2(l) at 25°C Is 0

The Vapor Pressure of Br₂(l) at 25°C Is 0