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Does Cold Water Boil Faster than Warm Water?

based on 33 ratings
Author: Sharon Cooper
Type

Chemistry/Thermodynamics

Grade

Elementary School

Difficulty of Project

Easy

Cost

$0

Safety Issues

None

Material Availability

Easily available from your kitchen

Approximate Time Required to Complete the Project

An hour

Objective

  • To determine whether cold water boils faster than warm water
  • To understand the implications of water temperature. 

Materials and Equipment / Ingredients

  • Two pots
  • Warm water
  • Cold water 

Introduction

The mpemba effect can cause hot water to freeze faster than cold water. This has led to a popular kitchen myth: that the opposite is also true. Namely, that cold water boils faster than hot water. How true is this? 

Research Questions
  • Does cold water boil faster than hot water? 
Terms, Concepts and Questions to Start Background Research
  • What is the mpemba effect?
  • What is the ideal boiling point for water?
  • How does this boiling point change in different situations? 

Experimental Procedure

  1. Take two pots.
  2. Fill one pot with cold water, and one pot with warm water.
  3. Place the pots on a stove and put them on identical heat settings.
  4. Time which one heats up first.

Bibliography

Kurtus, Ron. Mpemba Effect: When Hot Water Freezes Before Cold Water. School for Champions. Oct 30, 2002. http://www.school-for-champions.com/SCIENCE/mpemba.htm

Chaplin, Martin. Water Structure and Science. Creative Commons Attribution. http://www1.lsbu.ac.uk/water/explan4.html

 

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