Magnetic Field Of A Cube For Each Of These Processes, Is The Entropy Change Positive Or Negative?

For each of these processes, is the entropy change positive or negative? - magnetic field of a cube

For each of these processes, the entropy change is positive or negative?

melting ice cubes to -5 º C
Dissolve sugar in hot coffee
to form the reaction of nitrogen atoms, N2 molecules
Alignment of iron filings in a magnetic field
Formation of CH4 and O2 molecules of CO2 and H2O at room temperature.