IB ESS Exam Notes Complete Latest Update 2025/2026

IB ESS Exam Notes Complete Latest Update 2025/2026 System - Correct Answer An assemblage of parts and their relationship forming a functioning entirely or whole Open System - Correct Answer Exchanges matter AND energy Closed System - Correct Answer Exchanges ONLY energy Isolated System - Correct Answer DOES NOT exchange matter or energy. Theoretical. 1st Law of Thermodyamics - Correct Answer Energy is neither created nor destroyed. IT ONLY CHANGES FORMS. 2nd Law of Thermodynamics - Correct Answer The entropy of a closed system increases. When energy is transformed into work, some energy is always lost as waste and/or heat Steady-State Equilibrium - Correct Answer In open systems. Continuous inputs and outputs of energy and matter. The system as a whole remains in a constant state. There are no long term changes. Static Equilibrium - Correct Answer There is no change over time. When the state of equilibrium is distributed, the system adapts a new equilibrium. Stable Equilibrium - Correct Answer The system returns to the same equilibrium after a disturbance.