Question

Write statement of second law of thermodynamics.

Hint:

Remember: \(\Delta S_{total} = \Delta S_{system} + \Delta S_{surroundings}>0\) for any spontaneous process.

Answer 1

Step 1: Understanding the Concept:
The Second Law of Thermodynamics deals with the direction of spontaneous processes and the quality of energy.
Step 2: Detailed Explanation:
There are several ways to state this law:
1. Clausius Statement: Heat cannot spontaneously flow from a colder body to a hotter body without the performance of external work.
2. Kelvin-Planck Statement: It is impossible to construct a heat engine that operates in a cycle and converts all the heat absorbed from a reservoir into work.
3. Entropy Statement: The total entropy of an isolated system always increases in a spontaneous process.
Step 3: Final Answer:
The Second Law states that any spontaneous process is accompanied by an increase in the total entropy of the universe.