This energy required to break these interactions can be denoted as En.

Therefore, we can infer that for a liquid to flow, it must break its interactions with neighboring molecules. Where A is a constant for a given liquid and Eq can be referred to as the activation energy required for a liquid to begin flowing. This relationship can be expressed mathematically as: Over a wide temperature range, the viscosity of a pure liquid has been found to increase exponentially with the inverse absolute temperature. Where Ir, Pr, and tr are the viscosity, density, and flow time of the reference liquid. By measuring the flow time for a liquid with a density of p, you can determine its viscosity relative to that of a reference liquid (e.g., water in this case) using the equation: In this case, we will be comparing the values between p-xylene and distilled water. However, in order to use this method to determine the viscosity of a specific liquid, we must compare the time taken and the density of this liquid to the respective values of another liquid with a known viscosity.

It is important to note that the time taken for this process is dependent on the viscosity and density of the liquid. Specifically, we will measure the time it takes for the surface of the liquid to fall from the upper fiducial mark to the lower fiducial mark. SOLVED: To determine the viscosity of a liquid, we will measure the time it takes for a fixed volume of liquid to fall through the capillary column of the viscometer.

Testing viscosity of liquids