Answer to Question #193629 in Physical Chemistry for ethan felske

Question

You wish to grow a thin film of anthracene using thermal evaporation. If your thermal evaporation chamber can reach pressures as low as 10.0 mPa, to what temperature do you need to heat anthracene to cause it to sublime?

Answer 1

Pressure = P1 = 10 × 10^-3 pa .

T1 = 298 k .

Temperature of Sublimation = T2 = ?

Pressure = P2 = 10⁵ pa

P1 / T1 = P2 /T2

T2 = P2 × T1 / P1 .

T2 = 10⁵ × 298 / 10^{-3 .}

T2 = 298 × 10⁸ K .