Reactant p contains 50 j of energy, and reactant q contains 35.3 j of energy. the reactants combine to form product pq, which contains 104 j of energy. what is the energy transformation?

The chemical reaction based on the given above can be written as,
                       P + Q --> PQ
The energy in the left side of the equation will sum up to 85.3 J. That is the sum of the energy of P and Q. The energy in the right side of the equation is 104 J and is 18.7J more than that of the left side. This means that 18.7J of heat was absorbed during the process. 

Rn in the right answer