AP Chemistrymediummcq1 pt
A battery dies when its voltage reaches zero. What has happened?
A.The cell reached equilibrium (Q = K)
B.The salt bridge evaporated
C.The electrodes dissolved completely
D.The temperature dropped to 0 K
Explanation
Core Concept
As reactants deplete, Q climbs to K and the Nernst potential falls to zero. At equilibrium the cell can do no more electrical work.
Correct Answer
AThe cell reached equilibrium (Q = K)
More Unit 9: Applications of Thermodynamics practice questions
- easyWhat is the function of the anode in electrorefining copper?
- easyWhich change increases the entropy of a system?
- hardUsing E°: Fe²⁺/Fe = −0.44 V and Fe³⁺/Fe²⁺ = +0.77 V, which statement is correct?
- hardWhich reaction represents the cathode half-reaction in the hydrogen fuel cell?
- hardA 3.00 A current passes through AgNO₃ solution for 1930 s. What mass of silver deposits? (Ag = 107.9 g/mol)
Practice more AP Chemistry questions with full explanations
Practice Unit 9: Applications of Thermodynamics Questions →