 I am Nand Kishore, Professor in Department of Chemistry of Indian Institute of Technology Bombay. I am going to teach Fundamentals of Statistical Thermodynamics in this course. Thermodynamics is a very important branch of science and technology. In chemical thermodynamics, you remember that we have talked about bulk properties, average properties. In statistical thermodynamics, we are going to talk about molecular properties. So, the statistical thermodynamics is going to provide a link between molecular properties and bulk thermodynamic properties. In chemical thermodynamics, various thermodynamic quantities like enthalpies, entropy, Gibbs free energy, heat capacity, all those thermodynamic quantities could be experimentally measured by using calorimetry. Whereas, we will learn that in statistical thermodynamics by applying the various concepts, we will demonstrate that the same thermodynamic quantities can be measured by using spectroscopy. We will use the concepts of quantum mechanics. We will derive partition function. Partition function contains all thermodynamic information about the system. We will connect partition function with various thermodynamic quantities. Initially, we will start with independent molecules. What I mean is, we will not allow the molecules or the particles to interact with each other. And then we will introduce the concept of ensembles. Then we will allow the molecules to interact with each other. We will connect partition function with each thermodynamic quantity and we will discuss that how each thermodynamic quantity after having expressed in terms of partition function can be spectroscopically determined. After having studied independent molecules, ensembles, gases, we will have then some discussion about liquids and solids. So therefore, once again, in this course, we are going to connect molecular properties with the bulk thermodynamic properties. I hope you will enjoy this course and will learn fundamentals of statistical thermodynamics in a simple way. Thank you.