---
title: "A student calibrates a pressure sensor in a rigid, sealed chamber containing a fixed amount of an ideal gas. The gas is allowed to reach equilibrium under each condition shown.  | Condition | Temperature | Chamber volume | Amount of gas | |—|—:|—:|—:| | Initial | \\(300\\ \\text{K}\\) | \\(V\\) | \\(n\\) | | Heated | \\(1200\\ \\text{K}\\) | \\(V\\) | \\(n\\) |  How does the total frequency of molecular collisions with the chamber walls change when the gas is heated?"
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url: "https://nerd-notes.com/ubq/119427/"
date_modified: "2026-08-19T12:40:16+00:00"
---

# A student calibrates a pressure sensor in a rigid, sealed chamber containing a fixed amount of an ideal gas. The gas is allowed to reach equilibrium under each condition shown.

| Condition | Temperature | Chamber volume | Amount of gas |
|—|—:|—:|—:|
| Initial | \(300\ \text{K}\) | \(V\) | \(n\) |
| Heated | \(1200\ \text{K}\) | \(V\) | \(n\) |

How does the total frequency of molecular collisions with the chamber walls change when the gas is heated?

A student calibrates a pressure sensor in a rigid, sealed chamber containing a fixed amount of an ideal gas. The gas is allowed to reach equilibrium under each condition shown.

| Condition | Temperature | Chamber volume | Amount of gas |
|---|---:|---:|---:|
| Initial | \(300\ \text{K}\) | \(V\) | \(n\) |
| Heated | \(1200\ \text{K}\) | \(V\) | \(n\) |

How does the total frequency of molecular collisions with the chamber walls change when the gas is heated?

- **A.** It decreases by a factor of 2 because faster molecules remain in contact with the walls for less time during each collision.
- **B.** It remains unchanged because the number of gas molecules per unit volume remains unchanged.
- **C.** It increases by a factor of 4 because collision frequency is directly proportional to the Kelvin temperature.
- **D.** It increases by a factor of 2 because average molecular speed is proportional to the square root of the Kelvin temperature, while the chamber dimensions remain unchanged.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119427/*