| Assessment Questions: 14 results |
Thermodynamics : PredictEntropyChange (10 Variations)
For each of the following processes, indicate whether you expect the entropy change of the system to be positive or negative.
Thermodynamics
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Thermodynamics : CompareEntropyQual (16 Variations)
Indicate which substance in each of the following pairs of substances you expect to have higher entropy. Assume that you have a mole of each substance and all substances are at the same temperature.
Thermodynamics
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Thermodynamics : ProbabilityEnergyDist (23 Variations)
Consider a system that has two indistinguishable molecules that can occupy three different energy levels (having energies of 1kJ, 2kJ and 3kJ, respectively). What is the probability that the molecules will have a total energy of 2 kJ?
Thermodynamics
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Thermodynamics : CalcDeltaS (9 Variations)
Using  , calculate the entropy change for the reaction.
Thermodynamics |
Chemometrics
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Thermodynamics : DetermineRxnFavored (8 Variations)
When industrial plants burn coal, sulfur dioxide is produced. Sulfur dioxide is a primary pollutant that contributes to both industrial smog and acid rain. Is this process of producing sulfur dioxide product-favored?
Using
Thermodynamics |
Chemometrics
|
Thermodynamics : GibbsFromHSandT (5 Variations)
On the space shuttle, the carbon dioxide produced by the astronauts is handled by an environmental control system that utilizes the following reaction.
 H° = -138.4 kJ and S° = -139 J/K
Calculate G° at 25°C for this reaction.
Thermodynamics |
Chemometrics
|
Thermodynamics : EntropyPhaseChange (13 Variations)
Aluminum can be evaporated in a vacuum to form highly reflective coatings. Aluminum boils at 2792K and has a heat of vaporization of 70.0 kcal/mol. Calculate the entropy change for the vaporization of one mole of aluminum.
Thermodynamics |
Chemometrics |
Phases / Phase Transitions / Diagrams
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Thermodynamics : ConservGibbsEnergy (6 Variations)
Which of the following best illustrates conservation of Gibbs free energy?
Thermodynamics
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Thermodynamics : GeneralThermo (6 Variations)
Which of the following statements is an inaccurate statement about thermodynamics?
Thermodynamics
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Thermodynamics : InterpretKandDeltaG (16 Variations)
The thermodynamic equilibrium constant for the following reaction is 0.15 at 1227°C.
2 SO2(g) + O2(g) 
2 SO3(g)
Check the box for each true statement.
Thermodynamics
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Thermodynamics : ThermoKinStability (4 Variations)
Compare white and grey tin, both of which exist as solid phases of tin near room temperature.
| Phase
|
Hof (kJ/mol)
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So (J/(K*mol))
|
| white tin
|
0
|
51.5
|
| grey tin
|
-2.1
|
44.8
|
Which type of stability does each exhibit at 40 oC?
white tin {1:MULTICHOICE:kinetically stable#No, that's incorrect.~=thermodynamically stable#Correct!}
grey tin {1:MULTICHOICE:=kinetically stable#Correct!~thermodynamically stable#No, that's incorrect.}
Thermodynamics
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Thermodynamics : CalcDeltaG (14 Variations)
Using , calculate the Gibbs free energy change for the following reaction which produces the metal zinc from its ore zinc(II) oxide.
2 ZnO(s)  2 Zn(s) + O2(g)
Thermodynamics |
Chemometrics
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Thermodynamics : CalcMinSpontTemp (9 Variations)
Calculate the minimum temperature above which the following reaction will be product-favored (spontaneous).
Thermodynamics |
Chemometrics
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Thermodynamics : ATPFromGlucose (8 Variations)
When glucose is oxidized in the human body it releases a lot of Gibbs free energy. Rather than waste this free energy, the body stores much of it in the form of ATP. The following reaction shows this process of storing some of the energy from glucose in ATP. This is an example of coupled reactions in a biological system.
The label on a can of Coke says that it contains 39 g of sugar. Assume that all of the sugar is glucose (even though it isn't), and calculate how many moles of ATP can be produced theoretically by the oxidation of 39.0 g of glucose.
Thermodynamics |
Reactions |
Chemometrics
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