Hot high output tube from compressor.. on 1997 Dodge Dakota

What causes the output tube of the AC compressor to be so hot you cannot hold hand on it??? even when the AC seems to be cooling Ok it is still too hot to touch...

Asked by for the 1997 Dodge Dakota
The a/c recycles air after the heat is removed from it by the system. This is normal if the a/c system is working properly.