what are the chemical and physical properties of theobromine?
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General Description. Odorless white crystalline powder. Bitter taste. pH (saturated solution in water): 5.5-7.
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These properties are classified as physical properties and chemical properties. Physical properties are those that can be determined or measured without changing the composition or identity of the substance. These properties include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.
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['1 . They all contain carbon.', '2 . Most of them are flammable.', '3 . They are all soluble in non-polar solvents.', '4 . They are most, if not all, are covalently bonded molecules.']
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The characteristic of a pure substance is that it only contains atoms of only one kind. It has fixed physical and chemical properties, for example, melting point, boiling point, density, solubility, etc.
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['They are composed of amino acids.', 'They have excellent absorbency.', 'Moisture regain is high.', 'They tend to be warmer than others.', 'They have poor resistance to alkalis but good resistance to acids.', 'They have good elasticity and resiliency.']
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Chemical Properties. ... Some common physical properties are odor, density, melting point and boiling point, while some common chemical properties are heat of combustion, enthalpy of formation, toxicity, and flammability, each of which will be covered in this lesson.
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According to the National Hazardous Substances Database, humans may experience milder effects of theobromine at high enough doses, including sweating, trembling, and headaches. For the vast majority of people, eating chocolate and drinking tea in moderation is no problem.
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Four characteristics of a homologous series are: (i) The general formula of all compounds in the series is the same. (ii) They have the same functional group. (iii) Their physical properties such as melting point, boiling point, density, generally show a gradual change with increase of molecular formula in the series.
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Physical and chemical properties It is moderately soluble in water (2 g/100 ml at 20 °C) and soluble in most organic solvents such as ethanol, ether, phenols, aldehydes and ketones. Its evaporation rate is 27.5 (reference liquid is butyl acetate = 1). DCM vapours are heavier than air.
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General physical properties that can be explained by the covalent bonding model include boiling and melting points, electrical conductivity, bond strength, and bond length.
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['Electrical and thermal conductivity.', 'Malleability and ductility.', 'Melting point.', 'Solubility.']
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['They form crystals. ... ', 'They have higher enthalpies of fusion and vaporization than molecular compounds.', 'They are hard.', 'They are brittle.', 'They have high melting points and also high boiling points.', 'They conduct electricity but only when they are dissolved in water.', '...']
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['Metallic Nature.', 'Melting and Boiling Points.', 'Ionic Radii.', 'Atomic Volume and Densities.', 'Ionization Potentials.', 'Electronic Configuration.', 'Oxidation State.']
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['density – 7.13 g/cm³;', 'color – bluish-white;', 'melting point – 420 °C;', 'elasticity and malleability increase when heated to approximately 100 °C;', 'boiling point of 906 °C;', 'at temperatures above 200 °C, loses its elasticity and becomes a grey powder;', 'high heat capacity and heat conductivity;', 'good conductor.']
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Bromine is the only nonmetallic element that is liquid at ordinary temperatures. It is a dense, reddish-brown liquid which evaporates easily at room temperature to a red vapor with a strong, chlorine-like odor. Bromine is less reactive than chlorine or fluorine but more reactive than iodine.
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Nitrogen family elements display a wide range of physical and chemical properties. Their compounds may be transparent, either diamagnetic or paramagnetic at room temperature, and may conduct electricity when heated. Because the atoms form double or triple bonds, the compounds tend to be stable and potentially toxic.
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Answer and Explanation: A bromine (Br) atom has 7 valence electrons.