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This is the value found from actually performing some experiment, rather than the theoretical value, which is found from reference material. This could be something like 'determine the density of water'.
- You can look up in a reference table the density of water at a given temperature - this is the theoretical value.
- Now you perform the experiment. You measure the temperature, then you get a graduated cylinder and measure the mass of the empty cylinder. Now fill the cylinder with a specific amount of distilled water. Measure the mass of the filled cylinder. Subtract empty mass to get the mass of the water. Now density equals mass/volume, so divide.
This value obtained from the experiment is the experimental value.
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