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






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






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






4. The process of going from one phase to another






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






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






7. Vector sum of all bond dipoles in a structure






8. Groups linked by straight or branched carbon chains






9. >100 -000; there is no natural decay cycle for them


10. Mass (g)/molecular weight






11. 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)






12. 1 mole of a substance dissolved into enough water to make the mixture have a volume of 1 L.






13. Number of protons in the nucleus






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






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






16. Wavelength </= hc/E






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






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






19. The flow of electrons goes to...






20. Organic matter - silt - clay - sand






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






22. Natural waste






23. 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






24. H=U+PV; H2-H1=change in H=Q






25. 6.02x10^23 molecules






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






27. Unsaturated - has double bonds!






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






29. 1 atm and 298 K (kj/mol)






30. Photochemical reaction; photochemical dissociation; or simply photolysis






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






32. Organic - carbonates (they're inorganic)






33. Energy/mole






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






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






36. Benzene; graphite






37. Inorganic






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






39. All single bonds






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