Chemistry A-Level
Standard entropy values and their units
What Standard entropy values and their units means in Chemistry A-Level, as defined for OCR.
Definition of Standard entropy values and their units
Check what you remember
Read the wording for your board, then hide it and explain Standard entropy values and their units in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Tabulated entropies of reactants and products, usually quoted in J K⁻¹ mol⁻¹, used to calculate the entropy change of a system.
Topics that use Standard entropy values and their units
- Enthalpy and entropy (OCR A-Level)
Related terms
- Activation energy and reaction rate
- Comparison of solid, liquid and gas
- Entropy change and the T∆S term
- Entropy of the system
- Feasibility and the sign of ∆G
- Freedom of motion of particles in each state
- Gibbs equation and free energy change
- Gibbs free energy and feasibility
Using Standard entropy values and their units in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge