Question

At what temperature (if any) would the decomposition of pocl3 become spontaneous?

Answer 1

Explanation:

2POCl3(g)---> 2PCl3(g)+O2(g), deltaH_o=572 kJ, delta S_o=179 J/K

At what temperature (if any) would the decomposition of POCl3 become spontaneous

Answer 2

Answer:

At ,T=3195.53 Kelvin , the decomposition of PoCl3 become spontaneous.

Explanation:

Here,∆H=572KJ

∆S=0.179J/K

So , According to thermodynamical concept;

T=∆H/∆S,

=572/0.179= 3195.53 Kelvin

Here, Change in Gibbs free energy (∆G)=0

which shows that the reaction is in equilibrium.

Above this temperature the reaction become spontaneous and moves in the forward direction.