Final Fall Exam

Part A. Answer all twelve questions with a a couple of(prenominal) sentences or equations (5 marks each). 1. State Daltons constabulary of fond(p) pressures. Daltons law of partial pressures states that the total pressure of a mixture of gases is the sum of their partial pressures. 2. How does NO(g) act as a catalyst in the production of ozone at ground direct? Show the relevant reactions. NO(g) + ½ O2(g) ? NO2(g) NO2(g) + h? ? NO(g) + O(g) O(g) + O2(g) ? O3(g) Since NO(g) is destroyed in the prime(a) step but regenerated in the second step, it is acting as a catalyst. 3.Why does a misfire calorimeter actually meter (E, and non (H of a reaction? In a bomb calorimeter, the deal is constant, so no work is done. (H is measured just straightway under constant pressure conditions, like in a coffee cup calorimeter. 4. State Hunds reign. Hunds obtain states that electrons will occupy degenerate orbitals so as to be as unpaired as possible. 5. Why is a significance with a large bandgap likely to be unprejudiced? If the bandgap is large, then pull down aptitude photons, such as those in the manifest portion of the spectrum, do not have lavish energy to excite electrons from the HOMO to the LUMO.

These visible photons argon indeed not absorbed, and are transmitted by the substance, causing it to be transparent (clear). 6. Why does carbonic acid gas have a more lower boiling stopover than NO2? CO2 is a analog molecule, and is not polar, and therefore experiences however dispersion forces with other CO2 molecules. NO2 is bent-gra ss and polar, and therefore interacts with o! ther NO2 molecules via a relatively plastered dipole-dipole force. This subject matter that it will require more caloric energy to move free from these intermolecular forces, i.e. the boiling point will be higher. 7. Why is hexane (C6H14) not soluble in water? Hexane has only dispersion forces. Water has H-bonds. The two types of forces are very different, and just now put,...If you want to get a full essay, order it on our website: OrderEssay.net

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