Why is steam hotter than the boiling water?

Every substance requires some energy to change its form. Without energy, it cannot transform from solid to liquid, from liquid to vapor or from vapor to liquid. Sometimes, energy is derived in the form of heat from the atmosphere; at other times, the energy has to be provided by heating.

For example, one gram of water at 0° Celsius (freezing point) is in the solid form of ice. In order to heat up to a boiling point, it has to be heated to 100° Celsius. An ice cube that’s already melted starts agitating (boiling) at that stage. Now, if one wants to convert that boiling water into steam, the heat required for that purpose will be about 540° Celsius! Here, a question immediately arises: How did the figure of calories rise so high?

There is a reason for such a high increase. Every molecule of water tries to remain attached to another molecule and so on. This is called the property of polarization. It is not the property of molecules of water to separate from one another and get vaporized. Continuous increase in energy compels it to vaporize as steam, which occupies 1,670 times more space than water.

Hence, the heat has to push away the surrounding air molecules in the atmosphere. Some energy is used up in that process. Therefore, it is obvious that steam is inherently hotter than boiling water. In a steam engine, water boils at 100° Celsius; however, the temperature of its steam under pressure is 370° Celsius!

These fascinating facts about water are something that we can potentially observe in a simple science experiment or video. If your child is interested in science, here are some products that could help them enjoy this subject:

Where to Buy
365 Simple Science Experiments (with Everyday Materials)
The Everything Kids' Science Experiments Book by Tom Ro
Be Amazing! Toys Big Bag of Science Works


365 Simple Science Experiments (with Everyday Materials)

This book gives us an introduction to scientific fundamentals and guides us to conduct our own experiments without the need for fancy equipment. The projects detailed inside are quite easy to carry out, while the explanations of scientific concepts and methods are easy to understand.

The pages here are also filled with illustrations, so it shouldn’t be too hard to understand the steps for each experiment. Overall, this is something that will make a great gift or investment for any kid with an interest in science. Homeschooling parents have found it especially useful, though some have found the experiments a bit too simple.

The Everything Kids’ Science Experiments Book by Tom Ro

This book will help kids conduct several scientific experiments in a simple yet stimulating manner. All they’d need are a few items from around the house, and they might even be able to answer questions like why does paper curl up when heated, what liquid boils when it’s cold, and why sugar dissolves faster in hot water than cold.

With just a little effort, kids could be recreating several experiments a day. This will broaden their horizons and make them more interested in STEM subjects. However, keep in mind that this is a book for ages 7 to 12. Plus, some of the experiments will require parental supervision, so make sure you know what your child is up to.

Be Amazing! Toys Big Bag of Science Works

This science kit toy gives us real tools to conduct around 70 activities, including fizzing water, creating ‘worms’, and much more. It covers physical, earth, a life sciences along with chemistry-related activities. Other scientific subjects that are covered with this bag include physics, weather, magnetism, geology, etc.

With this purchase, kids will be able to hone their curiosity about the world and how it works. They can explore, discover, and wonder about new things every single day, which will hopefully develop their intelligence in a fun manner.

The price of this kit is also quite reasonable considering all the tools we get with it. These include test tubes, iron filings, a magnet, and several chemicals. Overall, this equipment can last for months, even allowing for several repeat experiments. School teachers have also recommended this product, along with parents who want something to stimulate their children’s mental prowess. They can also ask and research questions such as why is hot water milky in color, why does water gurgle when poured from a bottle, or why does gargling with salt water cure a sore throat.