What is the Difference Between True and Pseudo Critical Properties?
🆚 Go to Comparative Table 🆚The difference between true and pseudo critical properties lies in their determination and the values they represent. Here are the key distinctions:
- True Critical Properties: These are the real critical properties of a system, determined thermodynamically. True critical properties give realistic values and are calculated using thermodynamic processes.
- Pseudo Critical Properties: These are the apparent contribution of each pure component in a system to a particular reaction. Pseudo critical properties give apparent values and are calculated using linear models. Pseudo-critical values are not the actual critical temperature and pressure of the mixture but represent the values based on the summation of the "apparent" contributions of each pure component.
In summary, true critical properties represent the actual critical values of a system, while pseudo critical properties give an apparent value based on the contributions of each pure component in the system. True critical properties are determined thermodynamically, whereas pseudo critical properties are calculated using linear models.
Comparative Table: True vs Pseudo Critical Properties
The main difference between true and pseudo critical properties lies in their determination and the values they represent. Here is a table summarizing the differences:
| Property | True Critical Properties | Pseudo Critical Properties |
|---|---|---|
| Determination | Determined thermodynamically | Determined using linear models |
| Values | Represents the real critical properties of a system | Represents the apparent contribution of each pure component in a mixture |
| Critical Point | Refers to the temperature and pressure of a system at the critical point | Differs from the true critical properties substantially |
| Calculation | Calculated using thermodynamic processes | Calculated using composition and known critical pressure and temperature for the plus fraction |
| Realistic Values | Provides realistic values | Provides apparent values |
True critical properties are determined thermodynamically and represent the real critical properties of a system, such as the temperature and pressure at the critical point. On the other hand, pseudo critical properties are determined using linear models and represent the apparent contribution of each pure component in a mixture. These properties differ substantially from the true critical properties and are used as an approximation for systems with multiple components.
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