10 kg of liquid water is in a container maintained at atmospheric pressure, 101325 pa. The water is initially at 373. 15 k, the boiling point at that pressure. The latent heat of water -> water vapor is 2230 j/g. The molecular weight of water is 18 g. 103 j of heat is added to the water.

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

Ok, you asked the question and posted the answer on there. what do you need?