High School

Welcome to the article Imagine you have a pen pal who is studying chemistry just like you Your pen pal claims that the change from liquid water to water. On this page, you will learn the essential and logical steps to better understand the topic being discussed. We hope the information provided helps you gain valuable insights and is easy to follow. Let’s begin the discussion!

Imagine you have a pen pal who is studying chemistry just like you. Your pen pal claims that the change from liquid water to water vapor is a chemical change. Write a brief letter to convince your pen pal otherwise.

Answer :

Final answer:

The transition from liquid water to water vapor is a physical change because the molecular structure of H2O remains unchanged. It's an example of a phase change where water only changes form, not chemical composition, such as in evaporation and condensation.

Explanation:

Dear Penpal,

I hope this letter finds you well. I wanted to quickly address a point you made about the change from liquid water to water vapor. This process is actually a physical change, not a chemical one. When liquid water is heated, it transitions to water vapor, but the molecular structure of H2O remains unchanged during this phase change. The water molecules are merely moving from one state of matter (liquid) to another (gas).

To illustrate, consider how ice melting into liquid water is also a physical change. The water doesn't become a different compound; it just changes form due to the temperature increase. In fact, the process of water evaporating can be reversed by condensation, where the water vapor turns back into liquid water, further demonstrating that the substance hasn't chemically changed. On the other hand, chemical changes involve creating new substances with different properties, such as when gasoline burns and turns into carbon dioxide and water, which is quite different from the example of evaporation and condensation of water.

I hope this explanation helps clarify why turning liquid water into water vapor is a physical change. Keep up your great work in chemistry!

Sincerely,
Your Science Enthusiast Penpal

Thank you for reading the article Imagine you have a pen pal who is studying chemistry just like you Your pen pal claims that the change from liquid water to water. We hope the information provided is useful and helps you understand this topic better. Feel free to explore more helpful content on our website!

Rewritten by : Brahmana