Don't understand Enthalpy

[abcbac]

What is Enthalpy? I mean how is it different than heat. Also Enthalpy= change in energy+pressure*(change in volume). I don't understand where the PV comes into play in this equation.

[Borek]

Have you read your book, or wikipedia? What do the say?

You have to show your attempts before receiving help. This is a forum policy.

[Zeppos10]

What is Enthalpy? I mean how is it different than heat. Also Enthalpy= change in energy+pressure*(change in volume). I don't understand where the PV comes into play in this equation.

It can also be usefull to look around in this forum, for example at:
http://www.physicsforums.com/showthread.php?t=338573