A scientist performs an investigation in which thermal energy is removed from a sample of a substance. When the substance begins to change from a gas to a liquid, the scientist measures the temperature of the substance. This temperature is the substance's A. melting point
B. freezing point
C. evaporation
D. condensation

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.