Physical Chemistry (BSc) — Handwritten Notes (Narendra Avasthi)
Some chemistry topics are conceptual; others are computational. This 228-page volume by Narendra Avasthi leans firmly into the computational side, covering real gases, stoichiometry, chemical kinetics, radioactivity, and thermodynamics. The unifying thread is calculation — nearly every concept is followed by a worked numerical that shows you exactly how to apply the formula under exam conditions.
The thermodynamics section alone runs nearly eighty pages. Starting with the first law and moving through entropy, Gibbs energy, and the second and third laws, the notes maintain a consistent structure: state the principle, derive the relationship, plug in numbers. Students who find thermodynamics abstract will appreciate how often the notes ground each equation in a physical example rather than leaving it as pure mathematics.
What Makes These Notes Stand Out
Chemical kinetics gets a generous sixty-page treatment. Rate laws, reaction order, half-life calculations, and the Arrhenius equation are all worked through with examples. The section on radioactivity and nuclear chemistry — sixteen pages — covers decay kinetics, half-life, and nuclear reaction types, a topic that appears on B.Sc exams but is often underrepresented in standard textbooks.
The opening section on real gases is compact but effective. Van der Waals equation, compressibility factor, critical phenomena, and gas liquefaction are covered with just enough mathematical detail to understand the physics without getting lost in derivation. This section serves as a natural bridge between the ideal gas law taught in first year and the thermodynamics that follows.
Table of Contents
| Chapter | Pages | Highlights |
|---|---|---|
| Gaseous State — Real Gases | 1–16 | Van der Waals equation, compressibility factor, critical constants, liquefaction |
| Stoichiometry, Redox & Titration | 18–57 | Concentration terms, n-factor, redox balancing, titration calculations |
| Hardness of Water | 58–61 | Temporary and permanent hardness, estimation methods |
| Chemical Kinetics | 62–125 | Rate laws, reaction order, half-life, Arrhenius equation |
| Radioactivity & Nuclear Chemistry | 126–141 | Decay kinetics, half-life, nuclear reactions |
| Thermodynamics | 142–219 | First law, entropy, Gibbs energy, second and third laws |
Who Should Read This
First-year students benefit from the stoichiometry and redox sections, which reinforce mole concept fundamentals with n-factor problems and titration calculations. Second-year coursework typically introduces chemical kinetics and thermodynamics together, and this volume's treatment of both is self-contained enough to serve as a primary revision resource. Third-year students encounter nuclear chemistry and advanced thermodynamics, and the notes cover both with the numerical depth that university exams demand.
The real gas section also serves students preparing for competitive exams, where Van der Waals corrections and compressibility factor problems appear with regularity.