Find Final Voltage of Parallel Capacitors

[pelzerni]

Homework Statement

Two capacitors of 34.0 μF and 125 μF are separately charged to 126 μC and 250 μC, respectively. They are then attached in parallel so that the + plate of one goes to the - plate of the other, and vice versa. Determine the final voltage across the two plates.

Homework Equations

C=Q/Vc

The Attempt at a Solution

I calculated the change in voltage by adding Q1 and Q2 and then dividing by the sum of C1 and C2. (126+250)/(34+125)=2.36 V. How do I find the initial voltage so that I can get the final voltage?

 

[lewando]

Note how the 2 caps are attached to each other. "Initial voltage" does not seem like a relevant concept.