Three samples of three different gases are listed in the table below. All the samples contain exactly 1 mole of gas and are at a temperature of -15.0°C. For each sample, decide whether the gas can be reasonably described as an ideal gas. If the gas işn't ideal, decide the most important reason why it isn't. pressure volume If not ideal, the most sample ideal? (atm) (L) important reason why not: O yes O There are attractions between the particles. 1.7 15.0 O no O The particles don't have zero volume. O yes O There are attractions between the particles. B 0.76 25.0 O no O The particles don't have zero volume. O yes O There are attractions between the particles. C 0.79 35.0 O no O The particles don't have zero volume.

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### Identifying the Origin of Nonideality in a Gas

Three samples of different gases are analyzed below. Each sample contains exactly 1 mole of gas and is at a temperature of -15.0°C. For each sample, determine whether the gas can be reasonably described as an ideal gas. If the gas isn't ideal, identify the most significant reason.

| Sample | Pressure (Atm) | Volume (L) | Ideal? | If not ideal, the most important reason why not: |
|--------|----------------|------------|--------|-----------------------------------------------|
| A      | 1.7            | 15.0       | ⬤ yes  | ○ There are attractions between the particles.<br>○ The particles don’t have zero volume.       |
| B      | 0.76           | 25.0       | ○ yes  | ⬤ no  | ⬤ There are attractions between the particles.<br>○ The particles don’t have zero volume.       |
| C      | 0.79           | 35.0       | ○ yes  | ⬤ no  | ⬤ There are attractions between the particles.<br>○ The particles don’t have zero volume.       |

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**Explanation of Key Concepts:**

- **Ideal Gas Assumption:** Ideal gases are hypothetical gases that perfectly follow the ideal gas law (PV=nRT) under all conditions. Real gases deviate from this behavior at low temperatures and high pressures due to intermolecular forces and the volume of the gas particles.

- **Nonideality Causes:**
  - **Attractions Between Particles:** At low temperatures or high pressures, interactions between particles can become significant, causing deviations from ideal behavior.
  - **Finite Particle Volume:** Real particles occupy space; therefore, they don't have zero volume. This factor becomes significant under conditions where the gas particles are close together.

For each gas sample, after evaluating the pressure, volume, and temperature conditions, identify how closely it behaves according to the ideal gas laws and pinpoint the source of any nonideality.

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Transcribed Image Text:--- ### Identifying the Origin of Nonideality in a Gas Three samples of different gases are analyzed below. Each sample contains exactly 1 mole of gas and is at a temperature of -15.0°C. For each sample, determine whether the gas can be reasonably described as an ideal gas. If the gas isn't ideal, identify the most significant reason. | Sample | Pressure (Atm) | Volume (L) | Ideal? | If not ideal, the most important reason why not: | |--------|----------------|------------|--------|-----------------------------------------------| | A | 1.7 | 15.0 | ⬤ yes | ○ There are attractions between the particles.<br>○ The particles don’t have zero volume. | | B | 0.76 | 25.0 | ○ yes | ⬤ no | ⬤ There are attractions between the particles.<br>○ The particles don’t have zero volume. | | C | 0.79 | 35.0 | ○ yes | ⬤ no | ⬤ There are attractions between the particles.<br>○ The particles don’t have zero volume. | --- **Explanation of Key Concepts:** - **Ideal Gas Assumption:** Ideal gases are hypothetical gases that perfectly follow the ideal gas law (PV=nRT) under all conditions. Real gases deviate from this behavior at low temperatures and high pressures due to intermolecular forces and the volume of the gas particles. - **Nonideality Causes:** - **Attractions Between Particles:** At low temperatures or high pressures, interactions between particles can become significant, causing deviations from ideal behavior. - **Finite Particle Volume:** Real particles occupy space; therefore, they don't have zero volume. This factor becomes significant under conditions where the gas particles are close together. For each gas sample, after evaluating the pressure, volume, and temperature conditions, identify how closely it behaves according to the ideal gas laws and pinpoint the source of any nonideality. ---
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