IELTS Writing Task 2 is the same for both General and Academic papers. It is a 250 word minimum essay task that carries twice as many marks as task 1.
You have 1 hour to do both tasks, so it is recommended that you spend 40 minutes on task 2 and just 20 minutes on task 1.
If you have not studied for the IELTS test before then you might want to start by getting all the basic IELTS writing information here first.
If you are familiar with the test then take a look at the writing process and go through each article careful. You can then use the links at the bottom of the page to find questions and model answers to practice with.