Final answer:
Heating a carboxylic acid with a primary amine forms a secondary amide and water.
Step-by-step explanation:
When heating a carboxylic acid with a primary amine, the organic product formed, along with water, is a secondary amide. This reaction is an example of amidation, where the carboxyl group (-COOH) of the acid reacts with the amine group (-NH2) from the primary amine, resulting in the formation of a secondary amide and a molecule of water as a by-product. The process is important in the formation of peptides and proteins, where similar reactions link amino acids together.