# Given the options, and entropy data, which gives the correct #DeltaS^@_"rxn"# for the reaction.... #2NH_3(g)rarrN_2(g)+3H_2(g)# #"A. -299"*J*K^-1*mol^-1# #"B. -199"*J*K^-1*mol^-1# #"C. +199"*J*K^-1*mol^-1# #"D. +99"*J*K^-1*mol^-1#?

##### 1 Answer

Aug 8, 2017

This is simple summation.....I gets

#### Explanation:

Look at your reaction:

You produce 4 moles of gas from 2 moles of gas; the entropy, the statistical probability for disorder is likely to INCREASE......and so that leaves only

To decide, we have to an entropy summation......

But we have been given the individual entropies....and so.....