What happens to energy when adp and p come together to make atp?

Energy is absorbed

Explanation:

The phosphate bonds of ATP are high energy bonds. One phosphate bond can have an energy of ΔG of -30.5 kJ/mol. This is why ATP is an ideal energy molecule for cells because they preserve the energy of cellular respiration, derived from energy molecules, into their bonds. Later the energy can be harnessed when the ATP is hydrolyzed in a  biochemical reaction.

ATP+H2O→ADP+Pi ΔG = -30.5 kJ/mol

ATP+H2O→AMP+2Pi ΔG = -61 kJ/mol

2ADP+H2O→2AMP+2Pi ΔG = -61 kJ/mol

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.