Subject Matter Expert

Job Description

**Job Description**:
Subject Matter Expert - Physical Chemistry

Location: Delhi, India.

The Role

What you’ll do
- Authoring Solutions for advanced questions from Chemistry textbooks.
- Online answering of Chemistry questions posted by students globally on Chegg Website.
- Quality review of solutions submitted by external answerers.
- Content feedback fixing
- Practice Content creation & review
- Video Content Reviews
- Work on the domain specific Ad-hoc Projects.

**Requirements**:

- M. Sc Physical Chemistry.
- Knowledge of softwares like ChemDraw, Serif Draw will be added advantage.
- Excellent in communication skills, both oral and written.
- Willing to work in rotational shifts.

SME HIRING - PHYSICAL CHEMISTRY SYLLABUS

Quantum chemistry

Quantization of energy, wave-particle duality; blackbody radiation; the photoelectric effect; atomic spectra and the Bohr model of the hydrogen atom; Quantum mechanical waves and the Schrodinger equation; Solving the Schrodinger equation: operators, observables, eigenfunctions, and eigen values; the postulates of quantum mechanics; the expectation value; the particle in one-dimensional box; particle in two
- and three
- dimensional box; commutating and non-commutating operators; the Heisenberg uncertainty principle; the quantum mechanical harmonic oscillator; quantization of angular momentum; the hydrogen atom, formulating and solving the Schrodinger’s equation, eigen values and eigenfunctions of total energy; hydrogen atom orbitals, the radial probability distribution function

Chemical Bonding

Valence electrons, Stable electronic configurations, Lewis electron-dot symbols for atoms/ions, ionic bonds, octet rule, Lewis structure for ionic compounds, formulas and names of binary ionic compounds, electronegativity, covalent bonds, polar covalent bonds, determination of Lewis structures for polyatomic compounds/ions, the VSEPR theory, determination of molecular geometry.

Symmetry and group theory

Symmetry elements, symmetry operations, and point groups; Assigning point groups, Representations of symmetry operators, bases for representations, the character table, the great orthogonality theorem; symmetries of the normal modes of vibration of molecules.

Molecular spectroscopy

Vibrational spectroscopy of diatomic molecules: oscillations of systems with one degree of freedom, the diatomic molecule, the potential energy function for a chemical bond.

Vibrational spectroscopy of polyatomic molecules: rotation vibration spectra of polyatomic molecules, selection rules.

The Raman effect: classical treatment of Raman effect; quantum theory: rule of mutual exclusion, polarization of Raman lines, fermi resonance, influence of nuclear spin.

Electronic spectroscopy of diatomic molecules: The Born-Oppenheimer approximation; vibrational coarse structure; Frank-Condon principle; dissociation energy; electronic structure of diatomic molecules; electronic angular momentum in diatomic molecules; selection rules; rotational fine structure of electronic-vibrational transitions.

Electronic spectroscopy of polyatomic molecules: intensities of electronic transitions; types of electronic transitions; free electron model of linear polyenes; change of molecular shape on absorption.

Photochemistry

The Jablonski diagram; Beer-Lambert law; laws of photochemistry: Grotthus-Dapper law and Stark-Einstein law; Quantum yield; determination of quantum yield; photochemical reactions; kinetics of photochemical reactions; energy transfer in photochemical reactions: photosensitization and quenching; Quenching of fluorescence: The Stern-Volmer equation.

Thermodynamics

Thermodynamics and its importance; Internal energy and first law of thermodynamics; Heat; Work; State functions and path functions; reversible and irreversible processes; Heat capacity; Enthalpy; variation of enthalpy with temperature at constant pressure; variation of enthalpy with pressure at constant temperature; The Joule-Thomson experiment; Hess’s law; Entropy and the second law of thermodynamics; Spontaneity; Absolute entropies and the third law of thermodynamics; heat engines and Carnot cycle; Gibbs energy and Helmholtz energy; fugacity and equilibrium constant for real gases.

Statistical thermodynamics

Stirling’s approximation; probability distribution functions; microstates and configurations; Boltzmann distribution; Ensemble and molecular partition function; translational, rotation, vibrational and electronic partition function; the equipartition theorem; thermodynamic properties in terms of partition function; the Einstein solid; Residual entropy.

Solutions

Types of solutions; intermolecular forces in the solutions; concentration units: molarity, mole fraction, molality, percent by mass, percent by volume, part per million; factors affection the solubility: temperature and pressure; Henry’s law; Ideal and non-ideal solution; Raoult’s law; Colligative properties: vapor-pressure lowering, b