For the gas phase reaction, PCI_(5(g)) hArr PCI_(3(g)) + CI_(2(g)) Which of the following conditions are correct ?

For the gas phase reaction, PCI_(5(g)) hArr PCI_(3(g)) + CI_(2(g)) W

1.	For the gas phase reaction, PCI_(5(g)) hArr PCI_(3(g)) + CI_(2(g)) Which of the following conditions are correct ?
Answer» `Delta H= 0 and Delta S lt 0` `Delta H gt 0 and Delta S gt 0` `Delta h lt 0 and Delta S lt 0` `Delta H gt0 and Delta S lt` Solution :For the reaction, `PCI_(5(g)) hArr PCI_(3(g))+ CI_(2(g))` The reaction given is an example of decomposition reaction and we know that decomposition reaction are endothermic in nature, i.e. `Delta H gt0`. Further, `Delta N = (1+1)-1=+1` Hence, more number of molecules are PRESENT in PRODUCTS which shows more randomness i.e. `Delta S gt 0 (Delta S` is positive `)`