What is the Difference Between Absorptivity and Molar Absorptivity?
🆚 Go to Comparative Table 🆚There is no significant difference between absorptivity and molar absorptivity, as both terms describe the same concept: the absorbance of a solution per unit path length and concentration. The term "molar absorptivity" is derived from the Beer-Lambert Law, which states that the absorbance of electromagnetic waves by a solution is directly proportional to the concentration of the solution and the path length traveled by the light beam.
Molar absorptivity (ε) is a measure of how strongly a solution can absorb a light beam, and it depends on the type of analyte in the solution. It is calculated using the equation:
$$\varepsilon = \frac{A}{l \times c}$$
where:
- A is the absorbance
- l is the path length (distance traveled by the light beam)
- c is the concentration of the solution
The unit of molar absorptivity is L mol-1 cm-1, as the absorbance is unit-less. In summary, absorptivity and molar absorptivity both describe the absorbance of a solution per unit path length and concentration, with molar absorptivity being a specific term derived from the Beer-Lambert Law.
Comparative Table: Absorptivity vs Molar Absorptivity
There is no significant difference between absorptivity and molar absorptivity, as both terms denote the absorbance of a solution per unit path length and concentration. The term "molar absorptivity" is derived from the Beer-Lambert Law and is used to describe the absorbance of electromagnetic waves by a solution.
Here is a table summarizing the key points:
Term | Description | Units |
---|---|---|
Aborptivity | The absorbance of a solution per unit path length and concentration | - |
Molar Absorptivity | The absorbance of a solution per unit path length and concentration, derived from the Beer-Lambert Law | L mol-1 cm-1 |
Both absorptivity and molar absorptivity are used to describe the capacity of a solution to absorb light, with molar absorptivity being a more specific term that takes into account the concentration and path length of the solution.
- Molar Absorptivity vs Specific Absorbance
- Absorptance vs Absorbance
- Absorption vs Adsorption
- Absorbance vs Transmittance
- Optical Density vs Absorbance
- Conductivity vs Molar Conductivity
- Absorbance vs Fluorescence
- Emission vs Absorption Spectra
- Absorption Spectrum vs Emission Spectrum
- Calibration Curve Absorbance vs Concentration
- Atomic Absorption vs Atomic Emission
- Enthalpy vs Molar Enthalpy
- Excitation vs Absorption
- Absorption vs Assimilation
- Mass vs Molar Mass
- Flame Emission Spectroscopy vs Atomic Absorption Spectroscopy
- Atomic Absorption Spectroscopy vs UV Visible Spectroscopy
- Molarity vs Molality
- Atomic Mass vs Molar Mass