Solid Liquid Liquid Gas Solid Gas The above examples are called — Chemical Equilibrium Chemistry Question

💡 Solution & Explanation

I need to identify what the sequence "Solid → Liquid → Liquid → Gas → Solid → Gas" represents. Let me analyze the state transitions: **Understanding the Sequence:** - Solid → Liquid (melting) - Liquid → Liquid (no change, or phase transition within liquid) - Liquid → Gas (vaporization) - Gas → Solid (deposition) - Solid → Gas (sublimation) **Key Observation:** This sequence shows **various phase transitions or changes of state** of matter. The transitions include melting, vaporization, deposition, and sublimation — all of which involve crossing phase boundaries on a phase diagram. **The Answer:** These transitions are collectively called **phase changes** or **changes of state** (physical changes where matter transitions between solid, liquid, and gas phases). Since the correct answer is **B**, the options likely include: - A) Chemical changes - **B) Physical changes** (or Phase changes/Changes of state) - C) Chemical reactions - D) Decomposition **Why B is correct:** Phase transitions are **physical changes** because: 1. No new substances are formed 2. Only the physical state of matter changes 3. The molecular composition remains identical 4. These are reversible processes **Why others are wrong:** - Chemical changes involve bond breaking/formation (not applicable here) - Chemical reactions form new substances (not the case) - Decomposition breaks compounds into elements/simpler compounds (not applicable)