Under normal circumstances, the second movement will follow shortly after the end of the first movement. At this time, your applause will disturb the mood and thinking of the performer. This behavior is considered disrespectful and disruptive to the performer. There will be a long period of rest for the performers at the end of the whole piece, so the applause will not affect the performers from playing the next piece. Of course, some works can also be applauded during the performance on specific occasions. For example, you can applaud when John Strauss's Radesky is performed at the Vienna New Year Concert.