---
title: "A student heats a sample of liquid water at \\(100\\ ^\\circ\\text{C}\\) until it completely vaporizes according to the equation below.  \\[ \\text{H}_2\\text{O}(l) \\rightarrow \\text{H}_2\\text{O}(g) \\]  Which of the following correctly classifies this process and provides the best justification?"
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url: "https://nerd-notes.com/ubq/119649/"
date_modified: "2026-08-21T08:11:55+00:00"
---

# A student heats a sample of liquid water at \(100\ ^\circ\text{C}\) until it completely vaporizes according to the equation below.

\[ \text{H}_2\text{O}(l) \rightarrow \text{H}_2\text{O}(g) \]

Which of the following correctly classifies this process and provides the best justification?

A student heats a sample of liquid water at \(100\ ^\circ\text{C}\) until it completely vaporizes according to the equation below.

\[ \text{H}_2\text{O}(l) \rightarrow \text{H}_2\text{O}(g) \]

Which of the following correctly classifies this process and provides the best justification?

- **A.** It is a chemical change because intramolecular covalent \(\text{O}-\text{H}\) bonds within the water molecules are broken.
- **B.** It is a chemical change because intermolecular hydrogen bonds between water molecules are overcome.
- **C.** It is a physical change because intramolecular covalent \(\text{O}-\text{H}\) bonds are broken to allow molecules to separate.
- **D.** It is a physical change because intermolecular hydrogen bonds between water molecules are overcome while covalent bonds remain intact.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119649/*