Match the law of thermodynamics to its definition. 1. zeroth 2. first 3. second •the tendency of the universe is to increase entropy •heat can change energy from one form to another, but the amount of energy in the universe is constant. •two objects in thermal equilibrium will have no net heat flow between them.

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system