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Test your basic knowledge |

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






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






3. 1 atm and 298 K (kj/mol)






4. Inorganic






5. Mass (g)/molecular weight






6. 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






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






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






9. Number of protons in the nucleus






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






11. Unsaturated - has double bonds!






12. 6.02x10^23 molecules






13. 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)






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






15. Energy/mole






16. The flow of electrons goes to...






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






18. 1 mole of a substance dissolved into enough water to make the mixture have a volume of 1 L.






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






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






21. >100 -000; there is no natural decay cycle for them


22. Natural waste






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






24. Vector sum of all bond dipoles in a structure






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






26. Benzene; graphite






27. All single bonds






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






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






30. The process of going from one phase to another






31. Organic - carbonates (they're inorganic)






32. Wavelength </= hc/E






33. Organic matter - silt - clay - sand






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






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






36. Photochemical reaction; photochemical dissociation; or simply photolysis






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






38. Groups linked by straight or branched carbon chains






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






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






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