Category Archives: Engineering Thermodynamics

Macroscopic and Microscopic Approach to Study Thermodynamics

What are different approaches to study thermodynamics? We can understand thermodynamics from two viewpoints (or approaches). One is microscopic and another is macroscopic. Let us discuss each of them in detail. However, in Mechanical Engineering we only consider macroscopic approach. Macroscopic (or Classical) view In macroscopic approach we fix our attention to certain quantity of… Read More »

Pure Substance and Two Property Rule

Pure Substance Let we first go through the definition of pure substance to understand its meaning. “A pure substance is defined as one that is homogeneous and invariable in chemical composition throughout its mass” To understand the definition let us first we understand the meaning of the word homogeneous. The word homogeneous means that the… Read More »