The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?
Correct answer: D
Explanation
First, convert 50°C to Kelvin: T = 50 + 273.15 ≈ 323 K. Then, Psat = A - (5000/323). Assuming the constant A makes this equal to 0.13 atm.