---
title: "A student models the carbonation step of a beverage-production process. Identical samples of water are placed in pressure-rated vessels and allowed to reach equilibrium with pure \\(\\text{CO}_2\\text{(g)}\\) headspaces maintained at the conditions shown. The process being studied is \\(\\text{CO}_2\\text{(g)} \\rightleftharpoons \\text{CO}_2\\text{(aq)}\\).  | Condition | Temperature | \\(P_{\\text{CO}_2}\\) | |———–|————-|———————-| | 1 | \\(25^\\circ\\text{C}\\) | \\(1.0\\text{ atm}\\) | | 2 | \\(5^\\circ\\text{C}\\) | \\(2.0\\text{ atm}\\) |  Which of the following best predicts the equilibrium concentration of \\(\\text{CO}_2\\text{(aq)}\\) under condition 2 relative to condition 1?"
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url: "https://nerd-notes.com/ubq/119441/"
date_modified: "2026-08-19T12:40:24+00:00"
---

# A student models the carbonation step of a beverage-production process. Identical samples of water are placed in pressure-rated vessels and allowed to reach equilibrium with pure \(\text{CO}_2\text{(g)}\) headspaces maintained at the conditions shown. The process being studied is \(\text{CO}_2\text{(g)} \rightleftharpoons \text{CO}_2\text{(aq)}\).

| Condition | Temperature | \(P_{\text{CO}_2}\) |
|———–|————-|———————-|
| 1 | \(25^\circ\text{C}\) | \(1.0\text{ atm}\) |
| 2 | \(5^\circ\text{C}\) | \(2.0\text{ atm}\) |

Which of the following best predicts the equilibrium concentration of \(\text{CO}_2\text{(aq)}\) under condition 2 relative to condition 1?

A student models the carbonation step of a beverage-production process. Identical samples of water are placed in pressure-rated vessels and allowed to reach equilibrium with pure \(\text{CO}_2\text{(g)}\) headspaces maintained at the conditions shown. The process being studied is \(\text{CO}_2\text{(g)} \rightleftharpoons \text{CO}_2\text{(aq)}\).

| Condition | Temperature | \(P_{\text{CO}_2}\) |
|-----------|-------------|----------------------|
| 1 | \(25^\circ\text{C}\) | \(1.0\text{ atm}\) |
| 2 | \(5^\circ\text{C}\) | \(2.0\text{ atm}\) |

Which of the following best predicts the equilibrium concentration of \(\text{CO}_2\text{(aq)}\) under condition 2 relative to condition 1?

- **A.** It increases, because increasing \(P_{\text{CO}_2}\) increases gas solubility, but temperature does not affect gas solubility.
- **B.** It increases, because decreasing the temperature and increasing \(P_{\text{CO}_2}\) both increase the solubility of \(\text{CO}_2\) in water.
- **C.** It remains unchanged, because identical volumes of water must dissolve identical amounts of \(\text{CO}_2\).
- **D.** It decreases, because lower temperature and higher \(P_{\text{CO}_2}\) both favor transfer of \(\text{CO}_2\text{(aq)}\) into the headspace.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119441/*