Final answer:
The second law of thermodynamics states that the total entropy of a system either increases or remains constant in any spontaneous process; it never decreases. This means that as time passes, the total entropy in the universe will either increase or stay the same, but it will never decrease.
Step-by-step explanation:
The second law of thermodynamics states that the total entropy of a system either increases or remains constant in any spontaneous process; it never decreases. This means that as time passes, the total entropy in the universe will either increase or stay the same, but it will never decrease. The increase in entropy is due to the tendency of systems to become more disordered over time.