Entropy Numericals
Solve the following Numericals based on Entropy
Q1. A body at 200oC undergoes an reversible isothermal process. The heat energy removed in the process is 7875 J. Determine the change in the entropy of the body.
Q2. Air is compressed isothermally from 100 kPa to 800 kPa. Determine the change in specific entropy of the air.
Q3. A rigid insulated container holds 5 kg of an ideal gas. The gas is stirred so that its state changes from 5 kPa and 300 K to 15 kPa. Assuming Cp =1.0 kJ/kgK and g =1.4, determine the change of entropy of the system.
Entropy
Entropy means the amount of disorder or randomness of a system. It is a measure of thermal energy per unit of the system which is unavailable for doing work. The concept of entropy can be applied in various contexts and stages, including cosmology, economics, and thermodynamics. Entropy is a concept that essentially discusses the spontaneous changes that take place in ordinary phenomena or the Universe’s inclination towards disorder.
In this article, we will learn what is meaning of Entropy, the entropy change formula, and how it is associated with the laws of thermodynamics.
Table of Content
- What is Entropy?
- Properties of Entropy
- Entropy Formula
- Change in Entropy
- Entropy Changes During Phase Transition
- Entropy and Enthalpy