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Environmental Engineering

Instructions:

Answer 40 questions in 15 minutes.
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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. 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
standard enthalpy(pressure and temp)
0 - 1 - 22.4 L - 6.02x10^23 molecules
Aromaticity
four components of sand

2. All single bonds
finding the heat of reaction: the process
equation for the maximum wavelength for a photon that has enough energy for photolysis
enthalpy of a system
alkanes consist of...

3. The sum of the atomic weight of all the constituent atoms
aliphatics
alkenes are saturated/unsaturated aliphatics
molecular weight of a molecule
moles

4. Molecules cannot store up energy from a series of photon encounters (waiting until enough energy is accumulated to cause photolysis...
graphine is a 1 dimensional sheet of _________; whereas ___________ is layers of graphine.
The molecules that really want them (most electronegative)
what the lower heating value is based on
a single photon must have sufficient energy to cause photolysis all by itself

5. The mass of the atom measured in atomic mass units (1 proton=1 amu)
The molecules that really want them (most electronegative)
the dipole moment
the atomic weight of an atom
0 - 1 - 22.4 L - 6.02x10^23 molecules

6. Energy/mole
Hydrophobic
The change in enthalpy in the reaction
standard enthalpy
graphine is a 1 dimensional sheet of _________; whereas ___________ is layers of graphine.

7. Organic - carbonates (they're inorganic)
enthalpy of a system
the presence of carbon in a substance indicates that is it _____________ - except for _____________.
standard enthalpy(pressure and temp)
what the higher heating value includes

8. Wavelength </= hc/E
what the higher heating value includes
bulk pollutants are primarily ______________
equation for the maximum wavelength for a photon that has enough energy for photolysis
Aromaticity

9. Mass (g)/molecular weight
# of specific synthetic chemicals used daily and why it's potentially an issue
moles
Hydrophobic
finding the heat of reaction: the process

10. Ring structures: - enes (double bonds); - anes (single bonds)
cycloalkenes
finding the heat of reaction: the process
moles
the presence of carbon in a substance indicates that is it _____________ - except for _____________.

11. Atoms containing the same number of protons but differing amounts of neutrons are __________ of each other
bulk pollutants are primarily ______________
alkenes are saturated/unsaturated aliphatics
The molecules that really want them (most electronegative)
Isotopes

12. Inorganic
graphine is a 1 dimensional sheet of _________; whereas ___________ is layers of graphine.
bulk pollutants are primarily ______________
enthalpy of a system
the goal of water treatment is to remove _________________

13. Ortho: side by side - meta: one point away - forms an M - para: opposite each other
enthalpy of a system
aliphatics
aromatic isomers (ortho vs. meta vs. para)
standard enthalpy

14. When change in H (enthalpy) is positive - heat is _____________ and the reaction is said to be _____________
molarity
Absorbed; endothermic
a single photon must have sufficient energy to cause photolysis all by itself
Hydrophobic

15. Groups linked by straight or branched carbon chains
the presence of carbon in a substance indicates that is it _____________ - except for _____________.
The change in enthalpy in the reaction
aliphatics
Moles

16. 1 mole of a substance dissolved into enough water to make the mixture have a volume of 1 L.
enthalpy of a system
equation for the maximum wavelength for a photon that has enough energy for photolysis
Moles
A 1 molar solution

17. The number of moles of substance per liter of solution
cycloalkenes
the dipole moment
molarity
equation for the maximum wavelength for a photon that has enough energy for photolysis

18. If we divide the mass of a substance by its molecular weight - the result is the mass expressed in ________.
The molecules that really want them (most electronegative)
enthalpy of a system
molecular weight of a molecule
Moles

19. The heat released when water condenses to liquid form - also known as the gross heat of combustion
bulk pollutants are primarily ______________
The change in enthalpy in the reaction
aromatics
what the higher heating value includes

20. First balance the chemical reaction - then for each species multiply the number of moles by the standard enthalpy to find total enthalpy
finding the heat of reaction: the process
0 - 1 - 22.4 L - 6.02x10^23 molecules
alkanes consist of...
moles

21. For a photon to be able to cause photolysis - it must have at least as much energy as...
atomic number
the dipole moment
0 - 1 - 22.4 L - 6.02x10^23 molecules
The change in enthalpy in the reaction

22. Benzene; graphite
cycloalkenes
enthalpy of a system
graphine is a 1 dimensional sheet of _________; whereas ___________ is layers of graphine.
alkenes are saturated/unsaturated aliphatics

23. Photochemical reaction; photochemical dissociation; or simply photolysis
moles
Aromaticity
when a molecule is dissociated by absorbing a photon of energy
aliphatics

24. Change in enthalpy (H2-H1); the sum of the enthalpies of the reaction products minus the sum of the enthalpies of the reactants
A 1 molar solution
the atomic weight of an atom
graphine is a 1 dimensional sheet of _________; whereas ___________ is layers of graphine.
the heat of reaction

25. 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)
atomic number
cycloalkenes
when a molecule is dissociated by absorbing a photon of energy
the equation depicting the relationship between the energy contained in 1 photon and the wavelength and frequency associated with the photon produced is...

26. Natural waste
The change in enthalpy in the reaction
the goal of water treatment is to remove _________________
molecular weight of a molecule
four components of sand

27. The process of going from one phase to another
aromatic isomers (ortho vs. meta vs. para)
finding the heat of reaction: the process
organic molecule partitioning
the atomic weight of an atom

28. H=U+PV; H2-H1=change in H=Q
four components of sand
enthalpy of a system
standard enthalpy(pressure and temp)
atomic number

29. 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
aliphatics
molarity
finding the heat of reaction: the process

30. Vector sum of all bond dipoles in a structure
a single photon must have sufficient energy to cause photolysis all by itself
the dipole moment
when a molecule is dissociated by absorbing a photon of energy
The molecules that really want them (most electronegative)

31. The heat of reaction when water is assumed to remain in a vapor state; also called the net heat of combustion
a single photon must have sufficient energy to cause photolysis all by itself
what the lower heating value is based on
atomic number
what the higher heating value includes

32. Circle (hexagonal if we'z gon get technical hurr) alkenes with double bonds at every other joint.
organic molecule partitioning
the dipole moment
the atomic weight of an atom
aromatics

33. The flow of electrons goes to...
moles
when a molecule is dissociated by absorbing a photon of energy
alkenes are saturated/unsaturated aliphatics
The molecules that really want them (most electronegative)

34. 6.02x10^23 molecules
aromatics
1 mole
molecular weight of a molecule
The change in enthalpy in the reaction

35. >100 -000; there is no natural decay cycle for them

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36. The more molecules of benzene - the more hydrophilic/hydrophobic the compound
the goal of water treatment is to remove _________________
Hydrophobic
standard enthalpy(pressure and temp)
when a molecule is dissociated by absorbing a photon of energy

37. Number of protons in the nucleus
atomic number
cycloalkenes
the equation depicting the relationship between the energy contained in 1 photon and the wavelength and frequency associated with the photon produced is...
the dipole moment

38. Unsaturated - has double bonds!
# of specific synthetic chemicals used daily and why it's potentially an issue
alkenes are saturated/unsaturated aliphatics
aromatic isomers (ortho vs. meta vs. para)
four components of sand

39. Organic matter - silt - clay - sand
bulk pollutants are primarily ______________
The molecules that really want them (most electronegative)
molecular weight of a molecule
four components of sand

40. 1 atm and 298 K (kj/mol)
standard enthalpy
standard enthalpy(pressure and temp)
aromatics
what the lower heating value is based on