4/9/2023 0 Comments Laboratory observation![]() ![]() Low boiling point liquids (acetone, 70% solution ethyl alcohol, 70% solution isopropyl alcohol), 30 mL F. This makes ice less dense than water, a property not commonly exhibited by other liquids. The greatest density achieved by water molecules is at 4☌.Īt temperatures higher or lower than 4☌, its density slowly decreases. However, there are substances which behave differently from this density-temperature relationship, by which one example is water. The transition of molecules of matter to a less random form, say from gas to liquid or from liquid to solid, causes a drastic increase in the density. When matter undergoes a transformation to a different phase, it undergoes an abrupt change in density. This is because an object’s volume undergoes thermal expansion at increasing temperature while its mass remains unchanged. It specifically decreases with increasing temperature. Density is dependent on many factors, one of which is temperature. Hence, density and the principle behind it were revealed. He then came to the realization that he could determine the ratio of the mass of the crown and the volume of water displaced by the crown, and compare it to the value measured from the pure gold sample. One day, when Archimedes was enjoying himself to a bath, he observed that the further he went down the tub, the lesser he weighed and the higher the water level rose up. It was seemingly impossible to identify the gold percentage that composed the crown because chemical analysis was still unstudied in those times. ![]() According to stories, King Hiero of Syracuse asked Archimedes to determine whether his new crown is made of pure gold or not. Density was purportedly discovered by the Greek scientist Archimedes in an unusual circumstance. It is an intrinsic property which is represented by the ratio of a matter’s mass to its volume. Review of Related Literatureĭensity is one of the most important and commonly used physical properties of matter. the proper method of measuring the volume and consequently the density of irregularly shaped objects using water displacement method. the density of selected liquids and material at a given temperature andĢ. 3 Significance of the ExperimentĪt the end of the experiment, the laboratory performer is expected to learn the following ġ. to compare the density calculated from the given samples with the standard density at room temperature. to determine the density of alumina by measuring the mass and volume of variously shaped alumina balls andģ. To determine the density of low boiling point liquid samples by measuring their mass at controlled volume Ģ. Order custom essay Lab Report on Density Measurement In this experiment, the density of selected liquid samples will be measured using a pycnometer. There are various instruments that are used to accurately measure the density of substances the most commonly used are the densitometers, pycnometer, and hydrometers. The liquid is usually confined in a container, so its volume is relative to the volume of its container. The density of a homogeneous liquid is also defined by the amount of mass per unit volume. The conversion is given by 1 gcm3=1gmL=1000 kg/m3. However, its CGS units, g/cm3, or g/ mL, are the most commonly used ones in the laboratory. It is given by the equation ρ = mass/volume. For a bulk body without accounting its existing pores and voids, density is represented by the ratio of its mass and volume. Defined by the Greek letter ρ, read as rho, density is a basic yet important physical property of matter. ![]() Mass density describes how heavy an object is. ![]()
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