Physics A-Level
Change of phase
What Change of phase means in Physics A-Level, as defined for OCR.
Definition of Change of phase
Check what you remember
Read the wording for your board, then hide it and explain Change of phase in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
A process such as melting or boiling in which a substance absorbs or releases energy while its temperature stays constant.
Topics that use Change of phase
- Solid, liquid and gas (OCR A-Level)
Related terms
- Absolute zero
- Brownian motion
- Constant temperature during phase change
- Energy transfer in melting and boiling
- Experimental observation through a microscope
- Explaining shape, volume and pressure with the model
- Internal energy
- Internal energy and particle potential energy
Using Change of phase in the exam
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