dcfruit
contestada

At which temperature would a reaction with AH = -220 kJ/mol and
AS=-0.05 kJ/(mol-K) be spontaneous?

At which temperature would a reaction with AH 220 kJmol and AS005 kJmolK be spontaneous class=

Respuesta :

Edufirst

Answer:

  • C. 3600K

Explanation:

The condition for a reaction to be spontaneous is that the change if the free energy, ΔG, be negative.

The definition of G is G = H - TS, from which, at constant temperature:

  • ΔG = ΔH - TΔS

Thus, you must solve:

  • ΔG = ΔH - TΔS < 0

Substituting:

  • -220kJ/mol - T(-0.05kJ/mol) < 0

  • -220kJ/mol + T(0.05kJ/mol) < 0

  • T < -220kJ/mol / ( 0.05kJ/mol)

  • T < 4,400K

The only choice with a temperature less than 4,400K is C. 3600K.

Answer:

3600 K

Explanation:

i just took the test on a pex :)

Otras preguntas