For spontaneous changes in an isolated system (S = entropy) ________?

Coals used for the generation of producer gas should have ________?

Assume that benzene is insoluble in water. The normal boiling points of benzene and water are 80.1 and 100°C respectively. At a pressure of 1 atm, the boiling point of a mixture of benzene and water is________?

Dry ice (solidified CO2) is used for the________?

In a chemical process, the recycle stream is purged for________?

In screen analysis, the notation +5 mm/-10 mm means particles passing through ________?