---
title: "A student uses a pair of rigid bulbs connected by a tube of negligible volume. Initially, the stopcock between the bulbs is closed, and the conditions are shown in the table.  | Bulb | Volume | Gas | Initial pressure | Initial temperature | |——|——–|—–|——————|———————| | A | \\(1.00\\ \\text{L}\\) | \\(\\text{H}_2\\text{(g)}\\) | \\(4.00\\ \\text{atm}\\) | \\(600\\ \\text{K}\\) | | B | \\(2.00\\ \\text{L}\\) | \\(\\text{O}_2\\text{(g)}\\) | \\(1.00\\ \\text{atm}\\) | \\(300\\ \\text{K}\\) |  The student opens the stopcock, allowing the gases to fill both bulbs, and then uses a spark to initiate the reaction  \\[ 2\\text{H}_2\\text{(g)}+\\text{O}_2\\text{(g)}\\rightarrow 2\\text{H}_2\\text{O(g)} \\]  After the reaction is complete, the entire apparatus is maintained at \\(600\\ \\text{K}\\). At this temperature, all the water remains gaseous. Assuming ideal behavior, which of the following gives the final total pressure, \\(P_{\\text{total}}\\), and the final partial pressure of \\(\\text{O}_2\\), \\(P_{\\text{O}_2}\\)?"
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url: "https://nerd-notes.com/ubq/120039/"
date_modified: "2026-08-21T08:40:53+00:00"
---

# A student uses a pair of rigid bulbs connected by a tube of negligible volume. Initially, the stopcock between the bulbs is closed, and the conditions are shown in the table.

| Bulb | Volume | Gas | Initial pressure | Initial temperature |
|——|——–|—–|——————|———————|
| A | \(1.00\ \text{L}\) | \(\text{H}_2\text{(g)}\) | \(4.00\ \text{atm}\) | \(600\ \text{K}\) |
| B | \(2.00\ \text{L}\) | \(\text{O}_2\text{(g)}\) | \(1.00\ \text{atm}\) | \(300\ \text{K}\) |

The student opens the stopcock, allowing the gases to fill both bulbs, and then uses a spark to initiate the reaction

\[
2\text{H}_2\text{(g)}+\text{O}_2\text{(g)}\rightarrow 2\text{H}_2\text{O(g)}
\]

After the reaction is complete, the entire apparatus is maintained at \(600\ \text{K}\). At this temperature, all the water remains gaseous. Assuming ideal behavior, which of the following gives the final total pressure, \(P_{\text{total}}\), and the final partial pressure of \(\text{O}_2\), \(P_{\text{O}_2}\)?

A student uses a pair of rigid bulbs connected by a tube of negligible volume. Initially, the stopcock between the bulbs is closed, and the conditions are shown in the table.

| Bulb | Volume | Gas | Initial pressure | Initial temperature |
|------|--------|-----|------------------|---------------------|
| A | \(1.00\ \text{L}\) | \(\text{H}_2\text{(g)}\) | \(4.00\ \text{atm}\) | \(600\ \text{K}\) |
| B | \(2.00\ \text{L}\) | \(\text{O}_2\text{(g)}\) | \(1.00\ \text{atm}\) | \(300\ \text{K}\) |

The student opens the stopcock, allowing the gases to fill both bulbs, and then uses a spark to initiate the reaction

\[
2\text{H}_2\text{(g)}+\text{O}_2\text{(g)}\rightarrow 2\text{H}_2\text{O(g)}
\]

After the reaction is complete, the entire apparatus is maintained at \(600\ \text{K}\). At this temperature, all the water remains gaseous. Assuming ideal behavior, which of the following gives the final total pressure, \(P_{\text{total}}\), and the final partial pressure of \(\text{O}_2\), \(P_{\text{O}_2}\)?

- **A.** \(P_{\text{total}}=1.33\ \text{atm}\) and \(P_{\text{O}_2}=0\ \text{atm}\)
- **B.** \(P_{\text{total}}=2.00\ \text{atm}\) and \(P_{\text{O}_2}=0.667\ \text{atm}\)
- **C.** \(P_{\text{total}}=2.67\ \text{atm}\) and \(P_{\text{O}_2}=1.33\ \text{atm}\)
- **D.** \(P_{\text{total}}=3.00\ \text{atm}\) and \(P_{\text{O}_2}=1.00\ \text{atm}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120039/*