First Law of Thermodynamics

• Thermodynamics - study of relations between heat, work, temperature, and energy.
• First Law: energy cannot be created nor destroyed in an isolated system.
• System - quantity of matter or region for a study
• Surroundings - region outside the system
• Boundary - real or imaginary; separates system from surroundings
• Open system - exchange of heat and matter; matter can enter from or escape to the surroundings
• Energy - capacity to do work, directing change resulting from a process.
• Closed System - matter is not allowed to leave; heat only
• Isolated System - does not exchange matter nor energy with its surroundings
• Exothermic Reaction - releases energy in form of heat (product)
• Endothermic Reaction - absorbs energy from surroundings in form of heat (reactant)