Why do i burp after drinking hot coffee
Burping is the result of your body getting rid of air or gases that don't belong in your body. To answer you question, it's probably because you swallowed a little air while sipping your coffee.
Coffee is highly acidic. The digestive (chemical) processes therefore end up developing gases as a byproduct.
When you take hot coffee a lot of gas is taken in as you coffee goes in. Different people have different ways of releasing the excess gas in the digestive track. In your case, burping makes you release the gas in the digestive track.
You're taking in air as you drink.