Practice: Predict how the entropy of the substance is affected in the following processes:
CH4 (g, 125°C) → CH4 (g, 200°C)
Entropy is the disorder or chaos associated with a system’s inability to convert thermal energy into mechanical work.
Concept #1: Entropy
The Second Law of Thermodynamics states that there is a natural tendency of systems (chemical reactions) to move towards a state of disorder.
Example #1: The second law of thermodynamics leads us to conclude:
Concept #2: Entropy: Physical and Chemical Changes
Increase in temperature, moles of gas and bond breaking causes an increase in Entropy (+∆S).
Example #2: Which one of the following processes produces a decrease in the entropy of the system?
Practice: Predict how the entropy of the substance is affected in the following processes:
CH4 (g, 125°C) → CH4 (g, 200°C)
Practice: Which of the following processes shows a decrease in entropy of the system?
