You use that type of conditional (it is still the first one) when you describe situation/s what is linked with emotion/s, politeness, or very weak unlikly connection for ex. If you will eat apples you will be reach. There is also a construction ( under conditionals) like "if you went home, you felt better" - but i don`t remember which cond. it is. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.