Question

the reaction system quick check which statement is true of energy in reactants during an endothermic reaction? (1 point) some of the energy in the reactants will remain in them after the reaction, but some is lost to the surroundings. all of the energy from the reactants will remain in the system. the energy found in the reactants remains in the system, and the reactants also take energy from the surroundings. all of the energy from the reactants will be lost to the surroundings.

Explanation:

In an endothermic reaction, the system absorbs energy from the surroundings. The energy in the reactants is partially used to form products, and the reactants also take in energy from the surroundings. So the energy in the reactants (from their initial state) plus the energy from the surroundings is involved, meaning the energy from the surroundings is taken in, and the energy originally in reactants is part of the system's energy, with no loss to surroundings in the way the other options suggest. The correct statement is "The energy found in the reactants remains in the system, and the reactants also take energy from the surroundings" (the third option when listed as per the image, but based on the text, the option "The energy found in the reactants remains in the system, and the reactants also take energy from the surroundings" is correct). Wait, re - evaluating: Let's recall endothermic reactions. In an endothermic reaction, the system (the reaction) absorbs energy from the surroundings. The energy that was in the reactants is part of the system's energy, and additional energy is taken from the surroundings. So the option "The energy found in the reactants remains in the system, and the reactants also take energy from the surroundings" is correct. The other options: "Some of the energy in the reactants will remain... but some is lost" is wrong (endothermic doesn't lose energy to surroundings), "All of the energy from the reactants will remain" is incomplete as it doesn't account for the energy taken from surroundings, "All of the energy from the reactants will be lost" is wrong (opposite of endothermic). So the correct option is the one stating "The energy found in the reactants remains in the system, and the reactants also take energy from the surroundings".

Answer:

The option "The energy found in the reactants remains in the system, and the reactants also take energy from the surroundings" (the third option in the vertical list of options in the image).