Which of the following processes are spontaneous: (a) the melting of ice cubes at and 1...

Which of the following processes are spontaneous: (a) the melting of ice cubes at and 1 atm pressure; (b) separating a mixture of N₂ and O₂ into two separate samples, one that is pure N₂ and one that is pure O₂; (c) alignment of iron filings in a magnetic field; (d) the reaction of hydrogen gas with oxygen gas to form water vapor; (e) the dissolution of HCl(g) in water to form concentrated hydrochloric acid?