A 45.3g sample of lead metal (Cs = 0.129 J/goC) was heated to a temperature of 250 oC and then transferred to a coffee cup calorimeter containing 38.2 g of water at 18.5 oC. When the system reached thermal equilibrium, what was the final temperature?

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.

c

explanation:

answer seismograph;