Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Test 4 Review

CHEM 2

QuestionAnswer
A reaction that is spontaneous as written __________. Will proceed without outside intervention.
When a system is at equilibrium, __________. The process is not spontaneous in either direction.
Which of the following statements is true? Spontaneity can depend on the temperature.
The thermodynamic quantity that expresses the degree of disorder in a system is __________. Entropy
Which one of the following is always positive when a spontaneous process occurs? ΔSuniverse
The entropy of the universe is __________. Continually increasing
Which of the following statements is false? The change in entropy in a system depends on the initial and final states of the system and the path taken from one state to the other.
Which of the following processes produces a decrease in the system's entropy? Freezing water to form ice
Consider a pure crystalline solid heated from absolute zero to a temperature above the boiling point of the liquid. Which of the following processes produces the greatest increase in the entropy of the substance? Vaporizing the liquid
ΔS is positive for the reaction __________. BaF2 (s) → Ba2+ (aq) + 2F- (aq)
ΔS is positive for the reaction __________. 2SO3 (g) → 2SO2 (g) + O2 (g)
Which reaction produces a decrease in the entropy of the system? 2H2 (g) + O2 (g) → 2H2O (l)
Which reaction produces an increase in the entropy of the system? CO2 (s) → CO2 (g)
Of the following, the entropy of __________ is the largest. HI (g)
Of the following, the entropy of __________ is the largest. H2S (g)
Of the following, the entropy of gaseous __________ is the largest at 25°C and 1 atm. C3H7OH
For an isothermal process, the entropy change of the surroundings is given by the equation: ΔS = -qsys/T
What is the oxidation number of bromine in the BrO3- ion? +5
What is the oxidation number of nitrogen in the HNO3? +5
What is the oxidation number of sulfur in the HSO4- ion? +6
Which element is oxidized in the reaction below? Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2 (g) Fe
Which element is reduced in the reaction below? Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2 (g) H
What is the coefficient of the permanganate ion when the following equation is balanced? MnO4- + Br- → Mn2+ + Br2 (acidic solution) 2
What is the coefficient of the dichromate ion when the following equation is balanced? Fe2+ + Cr2O72- → Fe3+ + Cr3+ (acidic solution) 1
What is the coefficient of Fe3+ when the following equation is balanced? CN- + Fe3+ → CNO- + Fe2+ (basic solution) 2
The purpose of the salt bridge in an electrochemical cell is to __________. Maintain electrical neutrality in the half-cells via migration of ions.
Which transformation could take place at the anode of an electrochemical cell? NO → NO3-
Which of the halogens in Table 20.1 is the strongest oxidizing agent? F2
Which of the following elements is most likely to be a good oxidizing agent? Halogens
Which one of the following is the best oxidizing agent? O2
Consider an electrochemical cell based on the reaction: 2H+ (aq) + Sn (s) → Sn2+ (aq) + H2 (g) Which of the following actions would change the measured cell potential? 1. increasing the pH in the cathode 2. lowering the pH in the cathode 3. increasing the [Sn2+] in the anode 4. increasing the pressure of hydrogen gas in the cathode Any of the 4 choices above will change the measured cell potential.
The gain of electrons by an element is called __________. Reduction
__________ is the reducing agent in the reaction below. Cr2O72- + 6S2O32- + 14H+ → 2Cr3+ + 3S4O62- + 7H2O S2O32-
Which substance is serving as the oxidizing agent in the following reaction? 14H+ + Cr2O72- + 3Ni → 3Ni2+ + 2Cr3+ + 7H2O Cr2O72-
Which substance is the reducing agent in the following reaction? 14H+ + Cr2O72- + 3Ni → 3Ni2+ + 2Cr3+ + 7H2O Ni
What is the oxidation number of chromium in Cr2O72- ion? +6
What is the oxidation number of potassium in KMnO4? +1
What is the oxidation number of manganese in the MnO41- ion? +7
What is the oxidation number of manganese in MnO2? +4
What is the oxidation number of oxygen in H2O2? -1
__________ electrons appear in the following half-reaction when it is balanced. S4O62- → S2O32- 2
The electrode at which oxidation occurs is called the __________. Anode
In a voltaic cell, electrons flow from the __________ to the __________. Anode, Cathode
The more __________ the value of E° red, the greater the driving force for reduction. Positive
Created by: aarell82
Popular Chemistry sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards