[Sis290025]

The reaction X(s) <-> X(g) is known at 25 C to have standard enthalpy, and entropy changes of 136 kJ, and 170 J/K. At what temperature (C) does X(s) sublime ?

deltaG = deltaH - TdeltaS

=136 kJ - 298.15 K (0.17 kJ/K) = 85.3145 kJ

T = deltaH/deltaS = 136 kJ/0.17 kJ/K = 800 K

C = 800 K - 273.15 = 527 C

Thanks.

[Albert]

Correct.