Hot water freezes faster than cold water under certain conditions

the verdict

SUPPORTED

the evidence backs this

Recorded sources

4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Although counterintuitive, multiple scientific studies and historical observations confirm the Mpemba effect, demonstrating that hot water can freeze faster than cold water under specific, controlled conditions.

The analysis

The claim specifies that hot water freezes faster than cold water 'under certain conditions', which makes it a falsifiable, empirical statement that passes STEP 0. Multiple retrieved papers (such as [0], [1], [6], and [8]) discuss, test, and validate the Mpemba effect experimentally and theoretically, confirming that it does occur under specific conditions. There are no refuting papers in the provided set.

Evidence for · 4

The Mpemba effect: When can hot water freeze faster than cold?

Recorded source metadata

Monwhea Jeng. The Mpemba effect: When can hot water freeze faster than cold?. 2006. https://doi.org/10.1119/1.2186331

This review discusses the historical and contemporary observations of the Mpemba effect, wherein initially hot water freezes faster than initially cold water under certain conditions.

Source citation format

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More for · 3

Thermographic study of freezing water drops: An insight on Mpemba effect

Recorded source metadata

Argelia Balbuena Ortega, Emiliano Hernández Figueroa, Antonio Del Rio Portilla. Thermographic study of freezing water drops: An insight on Mpemba effect. 2024. https://doi.org/10.31349/revmexfis.70.050601

This study utilizes optical tools and thermography to analyze temperature changes in water drops, contributing to the ongoing discourse surrounding the Mpemba effect.

Source citation format

Unraveling Specific Conditions for a Repeatable Mpemba Effect.

Recorded source metadata

James D Brownridge, Matthieu Zinet, Paul Sotta, Francois Ganachaud. Unraveling Specific Conditions for a Repeatable Mpemba Effect.. 2025. https://doi.org/10.1021/acs.jpcb.5c05877

This study demonstrates that when cups of hot and cold water are placed in a freezer under controlled conditions, the hot sample can freeze faster than the cold sample.

Source citation format

Exponentially faster cooling in a colloidal system.

Recorded source metadata

Avinash Kumar, John Bechhoefer. Exponentially faster cooling in a colloidal system.. 2020. https://doi.org/10.1038/s41586-020-2560-x

This research demonstrates the Mpemba effect in a controlled colloidal system, showing that under specific parameters, hot systems can relax and cool faster than cooler ones.

Source citation format

The paper trail · every fact has a biography

first checked31 Jul 2026

judged → SUPPORTED · 8831 Jul 2026

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