Leture 22 - Introduction to Thermodynamics

Flashcards covering key vocabulary and concepts from thermodynamics related to energy reactions, calorimetry, and the laws governing energy transformation.

Exothermic reactions

Reactions that release heat; products have lower internal energy than reactants.

Endothermic reactions

Reactions that absorb heat; products have greater energy than reactants.

Internal energy (Uint)

The sum of energies for all individual particles in a sample of matter.

First law of thermodynamics

The change in internal energy of a chemical system is the sum of heat absorbed (q) by and work (w) done on the system.

Calorimetry

The science of measuring the heat of chemical reactions or physical changes.

Heat capacity

The amount of heat energy required to change the temperature of a substance.

Work (w) in thermodynamics

Energy transfer that occurs when a force is applied and results in a displacement.

Bomb calorimeter

An adiabatic device used to measure the internal energy change at constant volume.

Work done on the system

The energy transferred to a system due to volume change in contact with pressure.

Negative work

Occurs when a system expands; energy is done by the system on the surroundings.