Explain entropy as a measure of dispersal of energy or disorder.

In the subtopic Entropy and Gibbs free energy (A-level only), this AQA A-Level Chemistry 7405 learning objective focuses on explain entropy as a measure of dispersal of energy or disorder. It belongs to Thermodynamics (A-level only), so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include entropy. Gibbs free energy. means a thermodynamic potential that indicates the feasibility of a reaction, calculated using the formula ΔG = ΔH - TΔS Avoid the mistake of students often confuse entropy with energy, thinking it measures energy rather than the dispersal of energy or disorder in a system; instead, entropy (S) is defined as a measure of the dispersal of energy or disorder. To clarify, remember that higher entropy indicates greater disorder and energy dispersal in a system, while lower entropy indicates more order. For example, in a solid, particles are closely packed and have low entropy, whereas in a gas, particles are far apart and have high entropy For exam answers, remember that entropy is a measure of disorder or energy dispersal in a system. Higher entropy indicates greater disorder