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Enthalpy and entropy at a glance

Enthalpy and entropy at a glance

Particle diagrams of solid, liquid and gas for the same substance with an increasing entropy arrow and the order solid less than liquid less than gas

Enthalpy change, ΔH\Delta HΔH, is the heat energy change at constant pressure. Entropy, SSS, measures how dispersed energy is and how many different arrangements particles can have.

Enthalpy and entropy Lesson

  1. A Level
  2. /Chemistry
  3. /Enthalpy and entropy

Step-by-step lessons on OCR A A Level Chemistry Enthalpy and entropy. Each one builds up to exam-style questions. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.

Lessons