ME 3124 Chapter 2.6, 5, 6: Thermodynamics Part 2 - Second Law and Entropy [Key Formulas and notes]

Choose the correct statement that supports the second law of thermodynamics.

1. The second law of thermodynamics is a principle that demonstrates the conservation of energy

2. The second law states that energy always degrades quality-wise

3. According to this, the entropy of an isolated system may decrease or increase

4. This law states that the flow of energy can take place in any direction naturally

Which of the following statements is consistent with the second law of thermodynamics?

1. Energy can neither be created nor be destroyed

2. Entropy of the universe remains conserve

3. The entropy is decreasing with time

4. The entropy of the universe is continuously increasing with time

Explain why the second law of thermodynamics is considered as the directional law of heat transfer?