Gaseous dinitrogen pentoxide decomposes to produce oxygen gas and nitrogen dioxide gas. Predict whether the entropy will increase or decrease for this reaction.
Expert Answer
Answer
N2O5 (g)————–> 2NO2(g) + 1/2O2(g)
Srex = Sf products – Sf reactants
= 1/2*205.2 + 2*240 -346.6
= 236J/mole-K
it is spontaneous reaction.
N2O5 decomposes to gives 2 moles of NO2 and O2
so no of particles are increases. The entropy value is increases.