PS102 Study Guide - Final Guide: Sodium Chloride, Boiling Point, Hexane
Document Summary
Answer all twelve questions with a few sentences or equations (5 marks each). Dalton"s law of partial pressures states that the total pressure of a mixture of gases is the sum of their partial pressures. Since no(g) is destroyed in the first step but regenerated in the second step, it is acting as a catalyst. In a bomb calorimeter, the volume is constant, so no work is done. H is measured only under constant pressure conditions, like in a coffee cup calorimeter. Hund"s rule states that electrons will occupy degenerate orbitals so as to be as unpaired as possible. If the bandgap is large, then lower energy photons, such as those in the visible portion of the spectrum, do not have enough energy to excite electrons from the homo to the lumo. These visible photons are therefore not absorbed, and are transmitted by the substance, causing it to be transparent (clear).
