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Forces and Changes of State

Forces and Changes of State

Particle models of simple molecular, ionic and giant covalent structures alongside a temperature line for bromine showing solid, liquid and gas regions

Melting and boiling require energy to overcome attractions between particles. Stronger attractions need more energy to overcome, so the substance has a higher melting point and boiling point.

2.3.3 Bond strength, changes of state and predicting states Lesson

  1. GCSE
  2. /Chemistry
  3. /2.3.3 Bond strength, changes of state and predicting states

Step-by-step lessons on OCR GCSE Chemistry 2.3.3 Bond strength, changes of state and predicting states. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

Lessons