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Environmental Engineering

Subject : engineering
Instructions:
  • Answer 40 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. H=U+PV; H2-H1=change in H=Q






2. Energy/mole






3. 1 mole of a substance dissolved into enough water to make the mixture have a volume of 1 L.






4. Photochemical reaction; photochemical dissociation; or simply photolysis






5. Ortho: side by side - meta: one point away - forms an M - para: opposite each other






6. If we divide the mass of a substance by its molecular weight - the result is the mass expressed in ________.






7. 1 atm and 298 K (kj/mol)






8. Molecules cannot store up energy from a series of photon encounters (waiting until enough energy is accumulated to cause photolysis...






9. The heat of reaction when water is assumed to remain in a vapor state; also called the net heat of combustion






10. Groups linked by straight or branched carbon chains






11. Change in enthalpy (H2-H1); the sum of the enthalpies of the reaction products minus the sum of the enthalpies of the reactants






12. Unsaturated - has double bonds!






13. The mass of the atom measured in atomic mass units (1 proton=1 amu)






14. Organic matter - silt - clay - sand






15. E=hv=(hc)/wavelength where: E=energy of a photon (J) h=planck's constant (6.6x10^-34 Js) v=frequency (hertz - ie. cycles per second) c=speed of light (3.0x10^8 m/s) gamma=wavelength (m)






16. At standard STP (corresponding to __ degrees celsius and __ atm) - 1 mole of an ideal gas occupies ___ L and contains ___ molecules.






17. All single bonds






18. The heat released when water condenses to liquid form - also known as the gross heat of combustion






19. The sum of the atomic weight of all the constituent atoms






20. Mass (g)/molecular weight






21. Natural waste






22. Wavelength </= hc/E






23. 6.02x10^23 molecules






24. The more molecules of benzene - the more hydrophilic/hydrophobic the compound






25. The number of moles of substance per liter of solution






26. The process of going from one phase to another






27. Benzene; graphite






28. First balance the chemical reaction - then for each species multiply the number of moles by the standard enthalpy to find total enthalpy






29. The flow of electrons goes to...






30. >100 -000; there is no natural decay cycle for them


31. Inorganic






32. Vector sum of all bond dipoles in a structure






33. Number of protons in the nucleus






34. Atoms containing the same number of protons but differing amounts of neutrons are __________ of each other






35. Circle (hexagonal if we'z gon get technical hurr) alkenes with double bonds at every other joint.






36. Ring structures: - enes (double bonds); - anes (single bonds)






37. Electrons are free to cycle around arrangements of atoms which are alternatively single- and double- bonded to one another. These bonds may be seen as a hybrid of a single bond and a double bond - each bond in the ring identical to every other






38. When change in H (enthalpy) is positive - heat is _____________ and the reaction is said to be _____________






39. Organic - carbonates (they're inorganic)






40. For a photon to be able to cause photolysis - it must have at least as much energy as...