What are the limitations of first law of thermodynamics? How are these overcome in second law of thermodynamics? Explain briefly.

What are the limitations of first law of thermodynamics? How are these

1.	What are the limitations of first law of thermodynamics? How are these overcome in second law of thermodynamics? Explain briefly.
Answer» SOLUTION :2nd part : The 2nd law of thermodynamics overcomes these PROBLEMS by the introduction of a new variable called ENTROPY(S), which is a property of all thermodynamic systems. There are techniques to measure the change in entropy `(Delta S)` of a system and its surroundings during a process. If the entropy increases `(Delta S > 0)`, the 2nd law asserts that the process occurs in nature. In the reverse process, the entropy necessarily decreases `(Delta S < 0)`, and that process is not ALLOWED. Moreover, the amount of unavailable energy in a process. is directly proportional to `Delta S`, and can be calculated USING a simple formula.