'Apace' basically means with great speed, rapid movement, etc. Since you didn't include the passage, it's up to you to apply the definition in the context given.
Hopefully, this helps! =)
I can't really read this very well, would you mind uploading another picture?
The answer to this question depends on the particular poems you are examining at any given time. Byron, and more so Shelley, expressed a variety of different emotions and admiration for many different topics through their work. However, when speaking in broad terms, both poets shared several traits. Both poets were interested in aesthetics, and therefore, their poems often touch on the topic of beauty. Both poets were also Romantic, so they were interested in imagination, creativity and human emotion. They also celebrated and admired nature.
