Fundamentals of Thermochemistry

📋 Course Outline

1. Thermochemistry Definition
2. System and Surroundings
3. Types of Systems
4. State Functions
5. Thermodynamic Processes
6. First Law of Thermodynamics
7. Enthalpy Definition
8. Measuring Enthalpy
9. Standard Enthalpy of Formation
10. Hess's Law
11. Reaction Enthalpy Calculation
12. Real-World Applications

📖 1. Thermochemistry Definition

🔑 Key Concepts & Definitions

• Thermochemistry: The branch of chemistry that studies the heat changes that occur during chemical reactions and physical transformations. It focuses on energy transfer in the form of heat.

• Enthalpy ((H)): A thermodynamic property representing the total heat content of a system at constant pressure, defined as (H = U + PV), where (U) is internal energy, (P) is pressure, and (V) is volume.

• Exothermic Reaction: A chemical process that releases heat into the surroundings, characterized by a negative change in enthalpy ((\Delta H < 0)).

• Endothermic Reaction: A process that absorbs heat from its surroundings, characterized by a positive change in enthalpy ((\Delta H > 0)).

• Calorimetry: The experimental technique used to measure the heat transfer in chemical reactions, typically involving calorimeters such as coffee cup or bomb calorimeters.

• Standard Enthalpy of Formation ((\Delta H_f^\circ)): The change in enthalpy when one mole of a compound is formed from its elements in their standard states at 1 bar and 298 K.