SI
12/8/15
CHEM177
Dr. Jenks
Lauren D.
Final Exam Review Question:
2. A 10.00 g sample of a soluble barium salt is treated with an excess of sodium sulfate to precipitate
11.21 g BaSO4 (M = 233.4). Which barium salt is it?
(A) BaCl2 (M = 208.2)
(B) Ba(O2CH)2 (M = 227.3)
(C) Ba(NO3)2 (M = 261.3)
(D) BaBr2 (M = 297.1)
If H2O is at 0 degrees C, is it a solid or a liquid?
Lable the arrows below with the following words:
Fusion Vaporization
Condensation
Sublimation
Melting
Deposition
Lable the Heating Curve below with
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the proper terms:
Solid Liquid Gas Melting Fusion
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Concept Check: Molecules are more likely to
Evaporate if they have:
(High/Low) Temp
(High/Low) Kinetic Energy
(High/Low) Intermolecular Forces
(High/Low) Vapor Pressure
(High/Low) Molecular Weight
c(ice) = 2.06 J/gC,
c(H2O) = 4.184 J/gC,
c(steam) = 1.87 J/gC,
H(fus) for H2O is 334.J/g,
H(vap) for H2O is 2260 J/g
Calculate the amount of heat needed to melt 35.0 g of ice at 0 ºC. Express in kilojoules
Calculate the amount of heat needed to convert 96 g of ice at –24 ºC to water at 28 ºC
Calculate the amount of heat released to the environment as 245 g of steam at 140 ºC is
cooled to –15 ºC