Pure Urea And Cinnamic Acid

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Physical properties, such as melting point, boiling point, and solubility, are largely determined by intermolecular attractive forces. Organic molecules are organized into classes based on molecular size, composition, and the pattern of bonds between atoms. It allows the distinguishing of various samples in compounds. The structure of a molecule determines physical properties and reactivity. Melting point is a transition between a solid to a liquid and shows a point of equilibrium between the two states. Forces and bonds play a role in the melting point, such as london forces, dipole-dipole forces, hydrogen bonding, ionic bonds and intermolecular forces. London forces has a lower melting point, but a large melting point compared to other forces.…show more content…
Open end of the melting point capillary was placed into the powder, until it reached a height of 2-3mm. The approximate melting point temperature was found by placing the capillary in a heating bath (15C-20C). The Pure Urea appeared white and clumpy.The initial temperature was 120C and the melting point was reached at 133C. The Cinnamic Acid melted at 132C and had a shiny white appearance. Particles were much smaller than the Urea. During the Proportional Mixing, different mixtures in proportions of 1:4,50:50 and 4:1 were grinded and had their boiling points recorded. The proportion 1:4 was shiny and small particles, and had a 116C melting point. The 50:50 ratio was not as shiny as the previous one and had smaller clumps compared to Urea. 4:1 had more clumps and had a mild shininess. All the particles were white. When I performed the experiment the second time, I noticed the change in temperature. I took the temperature, when I conducted it the second time. The initial temperatures were way too high. Moreover the last experiment (Unknowns), place the two unknowns C and D into capillaries and determined their boiling point. Unknown C melted at 137C, while D melted at 95C. This experiment determined the melting point of pure urea and cinnamic acid, and a mixture of Urea and Cinnamic Acid. Cinnamic Acid showed signs of melting at the temperature of 128C. Then it became completely
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