dissolved in salt water) and cannot be filtered-out. Distillation is an ideal way to separate the two. Why is distillation an ideal way to separate the two? During the distillation process‚ the solvent-based waste is heated until it reaches the boiling point. It then evaporates (vaporizes) and passes through the condenser where heat is removed from the vapor and it turns back into a cool‚ clean reusable liquid (same process that causes dew to form). Fortunately‚ contaminates are typically not volatile
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vaporisation. f. . Melting point g. Boiling point 4. Why do gases diffuse rapidly? 5. Write the relationship between Celsius scale and Kelvin scale of temperature. 6. Why does the level of water not change when salt is dissolved in water? 7. How can matter change its state? 8. Define boiling. Why boiling is considered as bulk phenomenon? 9. Why does the temperature of a substance remain constant during melting and boiling even when heat is being supplied to
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Key Questions Unit Two Lesson Five 91/92= 99 % 15. a) 2‚3‚5-trimethylhexane b)3-ethyl-2‚4‚6‚7-tetramethyloctane c)2‚2-dimethylpentane 6 16. a)3-ethyl-3-methylhexane CH3 | CH3-CH2-CH-CH2-CH2-CH3 | CH2CH3 b) 1-ethyl-3-propylcyclohexane c) 2‚4-dimethylheptane CH3-CH-CH2-CH-CH2-CH2-CH3
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Chapter 1: Intermolecular Forces: Liquids‚ Solids‚ and Phase Changes Chem 11: General Chemistry 2 Topics 1.1 An Overview of Physical States and Phase Changes 1.2 Quantitative Aspects of Phase Changes 1.3 Types of Intermolecular Forces 1.4 Properties of the Liquid State 1.5 Uniqueness of Water 1.6 The Solid State: Structure‚ Properties and Bonding A hot spring on a snowy day The Kinetic Molecular View of the Three States The characteristic properties of gases‚ liquids
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obtained. The boiling point was 104° C‚ which is higher than the literature value of 101° C. This is due to the sample being somewhat impure‚ as impurities tend to increase boiling point. When IR spectroscopy was performed‚ there were no OH stretches‚ meaning that the OH- was replaced successfully by the Br-‚ and the water was separated out. The weight of our t-Pentyl Chloride sample was 0.20g. The percent yield was calculated to be 4.17%. The theoretical yield is 0.959g. The boiling point of the
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methods (simple and fractional) the liquids reach a boiling point‚ the molecules then vaporize‚ separate from the stock mixture and then condense back into liquid form down the to the receiver. Simple distillation works well when the two components boiling points have a large difference. Fractional distillation works best when the components boiling points have a small difference. The boiling point of cyclohexane is 80 degrees Celsius. Toluenes boiling point is about 110 degrees Celsius. The liquid with
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Charles’s Law Prepared by H. A. Neidig‚ Lebanon Valley College‚ and N. Spencer‚ Franklin and Marshall College PURPOSE OF THE EXPERIMENT Establish the relationship between the volume of a gas and the temperature of a gas at constant pressure. Verify Charles’s law. BACKGROUND INFORMATION The volume of a gas at constant pressure increases when the temperature of the gas is raised. This observation was first made by Jacques A. C. Charles in 1787. A quantitative study did not follow‚ however
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studied through distilling a series of mixtures with different mole fraction. When the mixtures were boiling‚ their vapor was condensed through a water column and collected in a receiving container. Refractive index was collected for starting mixture‚ distillate and residue for each sample. A boiling temperature versus acetone’s mole fraction was constructed to show the liquid-vapor phase diagram. The boiling temperature of azeotrope was determined to be 62.2oC with the composition of 23% acetone and 77%
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| |When a measurement greater than or equal to 1 has a decimal point expressed‚ every number is counted as a significant figure. Therefore‚ 62.930 | |u has 5 significant figures. [1 point] | |[pic]
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by which matter can change phase. Which are exothermic and which are endothermic? 5. Rubbing alcohol is very volatile. What does this statement mean? 6. What is dynamic equilibrium? Vapor pressure? 7. How is the “normal boiling point” different from any other boiling point? 8. When do you use heat of vaporization and heat of fusion instead of specific heat? 9. What are intermolecular forces? Explain each one and their relative strengths with respect to one another. 10. Are water and oil miscible
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