This appears to be a String Quartet Sonata. For some reason, it has multiple opus numbers. I'm a little confused, but I'm gonna blog anyways.
The Exposition opens up with the first violin sweetly playing the melody, with the rest of hte quartet accompaning. . A parallel period forms the FTA section, modulating to what appears to be the key of G major. Ending on a PAC, there is a disctinct separation between sections. It appears that the STA section is significantly longer than the previous, and begins much less dense, with the solo violin outlining the new melody. This section up until measure 43 may be transitional in nature, with the real STA section entering as the strings converge. The section ends on a PAC back in our original key of F, and the entire exposition section is repeated.
After the repeat, we seem to have another simple binary form section in the development. The A section is evolved using a quicker more chromatic melody in the first violin with a quick 16th note accompaniment. Ending on a HC in F major in measure 81, the b section reminds me a lot of the exposition. A short transition to measure 91, we see the b section enter. The b section goes all the way to bar 113, ending on a C major chord.
I think this section acts as a false return, because it is very similar, and ends practically the same as the FTA section of the expostion. However, it appears to be in the wrong key. Next ther is false return of the STA section that lasts until the real recapitulation of the FTA section occursing in bar 148, taking us to the end.