Absolute Entropy and Entropy Change Practice Test

Consider the reaction at constant temperature in a closed container: $\mathrm{N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)}$. Based only on the change in the number of gas particles, what is the sign of $\Delta S$ for the system?

A mixture is prepared by combining 1 mol of $\mathrm{He(g)}$ and 1 mol of $\mathrm{Ne(g)}$ in the same container at the same temperature and pressure, producing a uniform gas mixture. Compared with the two gases kept in separate containers under the same conditions, what is the sign of $\Delta S$ for the system upon mixing?