TIGER

Assessment Questions: 29 results
Thermodynamics : ConservGibbsEnergy (6 Variations)
Which of the following best illustrates conservation of Gibbs free energy?
Thermodynamics
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
Electrochemistry : CalcInterpretEo (20 Variations)
The following electrochemical data may be helpful in answering the question below.

Consider a cell composed of the following half-reactions. Determine the magnitude of E° for the cell and decide whether the reaction will be product-favored or reactant-favored as written.

Cr(s)  Cr3+(aq) + 3e-
Ce4+(aq) + e-  Ce3+(aq)

Electrochemistry |
Oxidation / Reduction
Electrochemistry : CalcDeltaGfromE (20 Variations)
The following electrochemical data may be helpful in answering the question below.

Calculate the dGo for the oxidation of 2 mole of silver in the following balanced reaction.

2Ag(s) + CaI2(aq) a Ca(s) + 2AgI(s)


Electrochemistry |
Oxidation / Reduction
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
Electrochemistry : IDHalfRxns (20 Variations)
What are the half-reactions for the reaction of Cs and Cl2 in the formation of CsCl2?

Cs + Cl2 Arrow CsCl2


Electrochemistry |
Oxidation / Reduction
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
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
Electrochemistry : BatteryHalfRxns (20 Variations)
The two half-reactions for the LeClanche dry cell battery are shown below. Identify the oxidizing and reducing agents in this cell.

Zn(s) Arrow Zn2+(aq) + 2e-
2NH4+(aq) + 2e- Arrow 2NH3(g) + H2(g)


Electrochemistry |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials
Electrochemistry : SacrificialAnode (10 Variations)
The following electrochemical data may be helpful in answering the question below.

One method for protecting metals against corrosion is to connect the metal directly to a "sacrificial anode". This is the method used to protect pipelines and ships hulls. Which of the following metals would you consider the best candidate for a sacrificial anode for a ship's hull? The hull is steel (which is mostly iron).


Electrochemistry |
Oxidation / Reduction |
Metals
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
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
Thermodynamics : GeneralThermo (6 Variations)
Which of the following statements is an inaccurate statement about thermodynamics?
Thermodynamics
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
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) 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
Thermodynamics : CalcDeltaS (9 Variations)
Using , calculate the entropy change for the reaction.

Thermodynamics |
Chemometrics
Thermodynamics : CalcMinSpontTemp (9 Variations)
Calculate the minimum temperature above which the following reaction will be product-favored (spontaneous).



Thermodynamics |
Chemometrics
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
Electrochemistry : CalcStandRedPotential (20 Variations)
The following electrochemical data may be helpful in answering the question below.

Calculate Eo for the following balanced reaction.

Fe(s) + Fe2(SO3)3(s) Arrow 3FeSO3(s)


Electrochemistry |
Oxidation / Reduction
Electrochemistry : GeneralCorrosion (10 Variations)
Which of the following statements not is true?
Electrochemistry |
Oxidation / Reduction
Electrochemistry : GeneralElectrochem (20 Variations)
Which of the following statements is not correct?
Electrochemistry |
Oxidation / Reduction
Electrochemistry : IDRedOxAgents (20 Variations)
In the following balanced reaction, identify the oxidizing and reducing agents.

Fe + Fe2(SO3)3 Arrow 3FeSO3


Electrochemistry |
Oxidation / Reduction
Electrochemistry : ElectrolysisHalfRxns (20 Variations)
The following electrochemical data may be helpful in answering the question below.

What will be the products of the electrolysis of an aqueous solution of Tin (II) sulfate (SnSO4)? (The electrodes themselves are platinum.)


Electrochemistry |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials
Electrochemistry : ECellObservations (20 Variations)

Consider the electrochemical cell diagram shown below. As you observe the reaction in the cell, you notice that the tin electrode seems to be disappearing while there are deposits forming on the silver electrode. Which of the following is a correct statement?


Electrochemistry |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials
Electrochemistry : ElectrolysisCalcs (20 Variations)
Calculate the mass of gold that could be plated from a solution with a current of 0.40 A for 22 min.

Au3+(aq) + 3 electrons Arrow Au(s)


Electrochemistry |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials
Electrochemistry : FuelCellsAndBatteries (20 Variations)
Determine whether the following descriptions are characteristic of fuel cells, primary batteries, secondary batteries or both batteries and fuel cells.
Electrochemistry |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials
Electrochemistry : BalanceRedoxRxn (20 Variations)
The following electrochemical data may be helpful in answering the question below.

Magnesium reacts with nitric acid to form magnesium nitrate and nitrogen monoxide in an acidic aqueous solution. Write the balanced equation for this reaction.


Electrochemistry |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials
Electrochemistry : BatteryDesign (8 Variations)
Students are attempting to construct a battery in the laboratory that will light up a light bulb. Compare the following lists prepared by students and determine which student will not be able to successfully build a "battery" that will light up the bulb.
Electrochemistry |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials
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