Question

How does the spontaneity of the process below depend on temperature? PCI5(9)+H2O(g)POCI3(g) +2HCI(g) -126 kJ mol1, AS = 146 J K-'mol1 ΔΗ Select the correct answer below: nonspontaneous at all temperatures spontaneous at all temperatures spontaneous at high temperatures and nonspontaneous at low temperatures spontaneous at low temperatures and nonspontaneous at high temperatures

Answer 1

Dear Student, Kindly refer to the complete solution. Feel free to ask if you face difficulty in understanding any step of the solution attached so that we can assist you in a better way.

Dear Student The relation important for determining spontaneity of any reaction is given 4G=AH-TAS Gibbs free energy change when AGCO (ie negative), the reaction is said to be spontaneous. In the reaction peovided, DH = – 126 kJ molt = – 126,000 Imal! el-ve) AS = 146 Jkt moet = (tre) phen Have AG=AH - TAS as= the = [-ve)- I (tve) -T(AS) = -re AG =(-ve) Reaction is spontaneous at all temperatures Best wishes!!