What happens to a sheet of copper as the average kinetic energy of the copper molecules decreases? a. it melts. b. it expands.** c. it gets cooler. d. it gains energy.

Temperature is directly proportional to the average kinetic energy of the molecules.  

KE = 3/2 kT where KE is the average kinetic energy of a molecule and k is Boltzmann's constant (1.381x10^-23 J/K).  

KE = 3/2 RT where KE is the average kinetic energy for a mole of molecules and R is the gas constant (8.314 J/molK).  

Therefore, as KE decreases, T decreases and it gets cooler.

It gets cooler...as metal gains energy it becomes hotter and melts...

**The correct answer is C

It gets cooler.

Explanation:

I took the test.

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.

answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;