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Environmental 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. The heat of reaction when water is assumed to remain in a vapor state; also called the net heat of combustion
standard enthalpy
Aromaticity
molecular weight of a molecule
what the lower heating value is based on

2. All single bonds
finding the heat of reaction: the process
four components of sand
alkanes consist of...
Moles

3. The number of moles of substance per liter of solution
The change in enthalpy in the reaction
1 mole
molarity
atomic number

4. When change in H (enthalpy) is positive - heat is _____________ and the reaction is said to be _____________
the atomic weight of an atom
aromatic isomers (ortho vs. meta vs. para)
four components of sand
Absorbed; endothermic

5. Change in enthalpy (H2-H1); the sum of the enthalpies of the reaction products minus the sum of the enthalpies of the reactants
the heat of reaction
moles
what the higher heating value includes
0 - 1 - 22.4 L - 6.02x10^23 molecules

6. The heat released when water condenses to liquid form - also known as the gross heat of combustion
enthalpy of a system
what the lower heating value is based on
the goal of water treatment is to remove _________________
what the higher heating value includes

7. Circle (hexagonal if we'z gon get technical hurr) alkenes with double bonds at every other joint.
what the lower heating value is based on
aromatic isomers (ortho vs. meta vs. para)
the presence of carbon in a substance indicates that is it _____________ - except for _____________.
aromatics

8. For a photon to be able to cause photolysis - it must have at least as much energy as...
what the lower heating value is based on
the atomic weight of an atom
1 mole
The change in enthalpy in the reaction

9. The flow of electrons goes to...
atomic number
finding the heat of reaction: the process
The molecules that really want them (most electronegative)
four components of sand

10. Groups linked by straight or branched carbon chains
The change in enthalpy in the reaction
enthalpy of a system
aliphatics
1 mole

11. 6.02x10^23 molecules
Absorbed; endothermic
what the lower heating value is based on
1 mole
molecular weight of a molecule

12. Natural waste
the goal of water treatment is to remove _________________
alkenes are saturated/unsaturated aliphatics
cycloalkenes
what the lower heating value is based on

13. 1 atm and 298 K (kj/mol)
atomic number
# of specific synthetic chemicals used daily and why it's potentially an issue
what the higher heating value includes
standard enthalpy(pressure and temp)

14. Molecules cannot store up energy from a series of photon encounters (waiting until enough energy is accumulated to cause photolysis...
aromatics
finding the heat of reaction: the process
the goal of water treatment is to remove _________________
a single photon must have sufficient energy to cause photolysis all by itself

15. Inorganic
Absorbed; endothermic
bulk pollutants are primarily ______________
when a molecule is dissociated by absorbing a photon of energy
Moles

16. >100 -000; there is no natural decay cycle for them

17. Unsaturated - has double bonds!
alkenes are saturated/unsaturated aliphatics
finding the heat of reaction: the process
standard enthalpy(pressure and temp)
the atomic weight of an atom

18. The process of going from one phase to another
The molecules that really want them (most electronegative)
aromatics
organic molecule partitioning
The change in enthalpy in the reaction

19. Benzene; graphite
Absorbed; endothermic
1 mole
Aromaticity
graphine is a 1 dimensional sheet of _________; whereas ___________ is layers of graphine.

20. Energy/mole
standard enthalpy
the goal of water treatment is to remove _________________
four components of sand
The molecules that really want them (most electronegative)

21. First balance the chemical reaction - then for each species multiply the number of moles by the standard enthalpy to find total enthalpy
molecular weight of a molecule
a single photon must have sufficient energy to cause photolysis all by itself
The molecules that really want them (most electronegative)
finding the heat of reaction: the process

22. Vector sum of all bond dipoles in a structure
bulk pollutants are primarily ______________
graphine is a 1 dimensional sheet of _________; whereas ___________ is layers of graphine.
Aromaticity
the dipole moment

23. The mass of the atom measured in atomic mass units (1 proton=1 amu)
what the lower heating value is based on
the atomic weight of an atom
four components of sand
A 1 molar solution

24. Mass (g)/molecular weight
standard enthalpy(pressure and temp)
moles
the presence of carbon in a substance indicates that is it _____________ - except for _____________.
the atomic weight of an atom

25. Ring structures: - enes (double bonds); - anes (single bonds)
the goal of water treatment is to remove _________________
equation for the maximum wavelength for a photon that has enough energy for photolysis
cycloalkenes
molarity

26. 1 mole of a substance dissolved into enough water to make the mixture have a volume of 1 L.
A 1 molar solution
equation for the maximum wavelength for a photon that has enough energy for photolysis
alkenes are saturated/unsaturated aliphatics
atomic number

27. 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)
molecular weight of a molecule
what the lower heating value is based on
the equation depicting the relationship between the energy contained in 1 photon and the wavelength and frequency associated with the photon produced is...
four components of sand

28. If we divide the mass of a substance by its molecular weight - the result is the mass expressed in ________.
Moles
molecular weight of a molecule
0 - 1 - 22.4 L - 6.02x10^23 molecules
the dipole moment

29. The sum of the atomic weight of all the constituent atoms
what the higher heating value includes
molecular weight of a molecule
equation for the maximum wavelength for a photon that has enough energy for photolysis
The change in enthalpy in the reaction

30. The more molecules of benzene - the more hydrophilic/hydrophobic the compound
when a molecule is dissociated by absorbing a photon of energy
The change in enthalpy in the reaction
Aromaticity
Hydrophobic

31. Ortho: side by side - meta: one point away - forms an M - para: opposite each other
1 mole
Moles
aliphatics
aromatic isomers (ortho vs. meta vs. para)

32. Organic matter - silt - clay - sand
1 mole
four components of sand
molarity
the dipole moment

33. Organic - carbonates (they're inorganic)
the presence of carbon in a substance indicates that is it _____________ - except for _____________.
A 1 molar solution
atomic number
standard enthalpy(pressure and temp)

34. H=U+PV; H2-H1=change in H=Q
the heat of reaction
1 mole
enthalpy of a system
The change in enthalpy in the reaction

35. Photochemical reaction; photochemical dissociation; or simply photolysis
moles
when a molecule is dissociated by absorbing a photon of energy
equation for the maximum wavelength for a photon that has enough energy for photolysis
alkenes are saturated/unsaturated aliphatics

36. Wavelength </= hc/E
equation for the maximum wavelength for a photon that has enough energy for photolysis
alkenes are saturated/unsaturated aliphatics
aromatic isomers (ortho vs. meta vs. para)
0 - 1 - 22.4 L - 6.02x10^23 molecules

37. Number of protons in the nucleus
aromatics
alkanes consist of...
atomic number
moles

38. Atoms containing the same number of protons but differing amounts of neutrons are __________ of each other
standard enthalpy(pressure and temp)
Isotopes
the goal of water treatment is to remove _________________
alkenes are saturated/unsaturated aliphatics

39. At standard STP (corresponding to __ degrees celsius and __ atm) - 1 mole of an ideal gas occupies ___ L and contains ___ molecules.
0 - 1 - 22.4 L - 6.02x10^23 molecules
what the higher heating value includes
when a molecule is dissociated by absorbing a photon of energy
finding the heat of reaction: the process

40. 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
0 - 1 - 22.4 L - 6.02x10^23 molecules
1 mole
the goal of water treatment is to remove _________________
Aromaticity