The temperature of a 75 g sample of material increases from 15 oC to 45 oC when it absorbs 2000 J of energy as heat. What is the specific heat of the material?

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.

you need to have a picture of the atom that way we can answer it

the correct answer would be b) volume versus temperature, because they are also directly proportional.