1. A 150 g piece of iron was heated to a temperature of 47°C and then placed in contact with a 275 g piece of copper at 20°C (CP = 25.46 J/(mol · °C)). What was the final temperature of the two pieces of metal? 2. If 5750 joules of energy are added to 455 grams of granite at 24.00 °C, what is the final temperature of the granite? Cs granite is 0.79 J/g oC.

2b2t

explanation:

2b2t

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.