Chemistry 2 Final/ 116 Question with Certified Ans/ .
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Course
Chemistry 2
Institution
Chemistry 2
Chemistry 2 Final/ 116 Question with Certified Ans/ . Terms like:
Hydrogen bonded to
________
is able to hydrogen bond with another molecule. - Answer: oxygen
For molecules of roughly the same size, boiling point increases with polarity due to increased - Answer: Dipole-dipole interactions
...
Chemistry 2 Final/ 116 Question with
Certified Ans/ 2024-2025.
Hydrogen bonded to
________
is able to hydrogen bond with another molecule. - Answer: oxygen
For molecules of roughly the same size, boiling point increases with polarity due
to increased - Answer: Dipole-dipole interactions
The transition from the solid phase to the gas phase is called - Answer:
Sublimation
The heat absorbed (or released) when crossing the solid-liquid phase boundary is
called the - Answer: Enthalpy of fusion
Page 1 of 16
,How much heat is required to melt 75.0 g ofwater (H20) at 0° C? - Answer: 25.0kJ
A _______ structure has a lattice point in the center of the cube. - Answer: Body-
Centered Cubic (BCC)
Electrons are free to move through the lattice in a(n) ____________solid. -
Answer: Metallic
A scuba diver uses a gas mixture that has a N2 mole fraction ofO.65. Ifthe Henry's
Law constant for N2 in water is 6.1 x lO M I atm, what is the nitrogen
concentration in water at a total pressure of4.O atm ofthis gas? - Answer: 1.6 mM
A dissolution can be both spontaneous and endothermic because of changes in
that occur upon dissolution - Answer: Entropy
In general, as temperature increases, the solubility of gases in liquids
_________, and the solubility of solids in liquids ________ - Answer: Decreases,
Increases
The colligative property of freezing point depression is proportional to solute
_____ - Answer: Molality
Scattering of light by a colloidal solution is called the ________ effect. - Answer:
Tyndall
Page 2 of 16
, Some acetonitrile (CH3CN) is dissolved in water (H20). Which ofthe following
intermolecular interactions does NOT occur in the solution? - Answer: Ion-Dipole
In the limit of infinite dilution, CaC12 has a van't Hoff factor of_________ -
Answer: 3
A solution with a total solute concentration of 0.185 M is __________relative to a
solution with a total solute concentration of 0.325 M. - Answer: Hypotonic
For some volatile liquid, a plot of the natural logarithm of vapor pressure vs.
inverse temperature has a slope of -8900 K. The enthalpy of vaporization
is__________kJ/mol. - Answer: 74.0
A solution is prepared by dissolving 2.87 g ofnaphthalene in 75 mL ofbenzene.
Naphthalene has a molecular formula of C10H8, and a molar mass of 128.18
g/mol. Benzene has a density of 0.877 g/mL. The molality of the solution
is_________m - Answer: .34
A solution is prepared from 6.50 g of caffeine (C8H10N402) and 15.0 g ofwater
(H20). The mole fraction of
caffeine is - Answer: 0.039
A gas has a solubility of 0. 15 M in water when its pressure is 14.7 psi. If the
pressure is tripled to 44. 1 psi, the new solubility is_____M - Answer: 0.45M
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