Distillation of Alcoholic Beverages Essay Example for Free

Distillation of Alcoholic Beverages Essay Distillation is the process where compounds are purified by separating the more volatile substance from non-volatile or less volatile substance. An example of this is the differences in boiling point. Boiling point is the temperature when the vapor pressure of a liquid-phased compound equals with the pressure exerted on it. This external pressure is usually atmospheric pressure. As the temperature of the liquid increase, the vapor pressure will also increase. And if this case will happen, the vapor pressure will equal to the atmospheric pressure that will cause boiling. Since different compounds have different boiling points, the components often separate from a mixture when the mixture is subjected to distillation. [2] Also, boiling points can be determined by the process of distillation. In distillation, vapor and liquid compositions are both interest. The compositions of the vapor and liquid are governed by Raoult’s and Dalton’s Laws; provided the vapor and solutions are both Ideal. Raoult’s law states that the vapor pressure of an ideal solution is dependent on the vapor pressure of each chemical component and the mole fraction of the component present in the solution. [1] While Dalton’s Law states that the total pressure exerted by a gaseous mixture is equal to the sum of the partial pressures of each individual component in a gas mixture. [1] At any temperature, some molecules of a liquid possess enough kinetic energy to escape into the vapor phase (evaporation) and some of the molecules in the vapor phase return to the liquid (condensation). Equilibrium is set up, with molecules going back and forth between liquid and vapor. At higher temperatures, more molecules possess enough kinetic energy to escape, which results in a greater number of molecules being present in the vapor phase. There are two types of distillation according to separation, the simple and fractional. Fractional distillation is used when the boiling points of chemicals in a mixture are close to each-other, while simple distillation is generally used when the boiling points are significantly different. In simple distillation, evaporation of a volatile liquid from a solution of non-volatile substances takes place. The water will condense the vapor through the water condenser that will be collected in the receiver. There are cases when the distillate would contain a majority of one liquid but would still contain a little of the second. In order to separate this, another distillation must take place. This repeated distillation is the principle behind fractional distillation wherein it redistills automatically. Automatic redistillation takes place on the apparatus called fractionating column. The vapor produced by the boiling mixture will rise up in the column and will condense when it reaches a certain point. Then it will turn into vapor again and will rise a little bit further up the column. The liquid will be completely purified after the vapor rise all the way to column and will condense in the condenser. In this experiment, the group aims to: (1) separate the alcohol content of the alcoholic beverage, (2) calculate for its percentage ethanol present, (3) and compare the efficiency of simple distillation and fractional distillation.

Pride And Prejudice: Summary :: essays research papers

Pride and Prejudice: Summary Jane Austen's Pride and Prejudice is a complex novel that relates the events surrounding the relations, lives, and loves of a middle-upper class English family in the late nineteenth century. Because of the detailed descriptions of the events surrounding the life of the main character of the story, Elizabeth Bennet, Pride and Prejudice is a very involving novel whose title is very indicative of the themes contained therein. The first volume opens in the Bennet household at Longbourn in England. As there are five unmarried daughters living in the home at the time, the matron of the family, Mrs. Bennet, is quite interested when news of a wealthy man moving to Netherfield, a place in the near vicinity. Mrs. Bennet, in the best interest of her daughters, soon after begins urging her husband to meet with the newly arrived neighbor, a Mr. Bingley, but he is quite reluctant to do so. Soon after, Mr.Bennet surprises his daughters and his wife by announcing that he had visited Netherfield and found Bingley to be "quite agreeable." The interest of the Bennet daughters arises when they learn that certain members of the Bingley party will be in attendance at an upcoming ball in Meryton. At the ball, acquaintances between the families are made, and all find both Mr.Bingley and his cousin Fitzwilliam Darcy to be exceedingly handsome, however Darcy's pride is so irritating and repulsive, it makes his character almost totally disagreeable. It is at this ball, however, that the oldest Bennet daughter, Jane, becomes involved with Mr.Bennet; her younger sister Elizabeth, however, falls victim to Mr. Darcy's pride and is shunned by him during the entire ball. Beginning with this event, Elizabeth forms a prejudice towards Mr. Darcy that will prevent her future involvement with him. It is here then that the two main themes of he work, pride and prejudice, are first presented. Soon after the ball, it becomes obvious that Mr. Bingley's feelings towards Jane deepen, and Jane's feelings also appear when the family visits their neighbors the Lucases after the Meryton Ball. This, however, produces concern from both his older sister and Mr. Darcy, who dislike the behavior of her family and, being part of the upper class, are prevented by their pride from liking anyone of lower status. Mr. Darcy's attitude towards Elizabeth Bennet, however, soon begin to change, as he appreciates her subtle beauty. It is because of her prejudice against him, however, that Elizabeth does not recognize his affections; he begins to join her conversations, and even expresses to his cousins his feelings.

Dualism versus Materialism Essay

This Paper shall tackle the long-term debate between dualism and materialism. It shall first present and define the concept of dualism. Then, it shall present the argument or arguments of the dualists, which shall be rebutted by the argument or argument of the materialists. After these, the concept of materialism shall be defined. Then, arguments for materialism shall be presented, which shall be rebutted by the argument or arguments of the dualists. Finally, the writer shall discuss his viewpoint on the matter — whether he believes in dualism; whether he believes in materialism; whether he believes in both; and why if any. Dualism as the term implies is a belief that there are two different substances or types of being (http://skepdic. com/dualism. html). These two are distinct and independent from one another as one is material and the other is spiritual (http://skepdic. com/dualism. html). The former is the one that is defined as the physical or the empirical world (http://skepdic. com/dualism. html). This is what we can identify through our senses — sight, smell, touch, taste and hearing (http://skepdic. com/dualism. html). In addition, this type of substance can be identified through instruments that extend our senses, such as radar, telescopes, etc. (http://skepdic. com/dualism. html). In short, external proof can easily be gathered as to the existence and essence of this type of substance. On the other hand, the latter type of substance is described as the negative of the other, i. e. non-physical, non-material and non-empirical (http://skepdic. com/dualism. html). This is also known as the psychological, mental or spiritual world (http://skepdic. com/dualism. html). The dualist believes in the existence and the interaction of both types of substances. A manifestation of this is the belief in the immortality. The dualists believe that as the spiritual world, as you may call it is separate from the material world, when the latter withers away, the former remains. Rene Descartes is a known dualist. He is also known as the Father of Modern Philosophy. He lived in a time of doubt and disappointment, which is why he devised the method known as the Universal Methodic Doubt. Through this method he doubted everything until he attained something that he could no longer doubt (Descartes, Meditations Discourse on Method and Meditations on First Philosophy). From this process, he realized that â€Å"[i] think therefore I am† (Descartes, Meditations Discourse on Method and Meditations on First Philosophy). For him this is the only thing that cannot be doubted is that he doubts (Descartes, Meditations Discourse on Method and Meditations on First Philosophy). Through his process, he realized that clear and distinct ideas are the first truths (Descartes, Meditations Discourse on Method and Meditations on First Philosophy). Examples of these ideas are the truths of mathematics. More importantly, through this method, he also realized the dichotomy between the spiritual and material world in that he can doubt the existence of his body but he cannot doubt that he exists as a being (Descartes, Meditations Discourse on Method and Meditations on First Philosophy). The dichotomy is further bolstered through the fact that his body is subjected to different rules or laws as compared to his mind (Descartes, Meditations Discourse on Method and Meditations on First Philosophy). His body is governed and follows the laws of physical science but his mind does not (Descartes, Meditations Discourse on Method and Meditations on First Philosophy). He posited the relation of the material substance to the spiritual substance in this wise: [e]xternal motions affect the peripheral ends of the nerve fibrils, which in turn displace the central ends. As the central ends are displaced, the pattern of interfibrillar space is rearranged and the flow of animal spirits is thereby directed into the appropriate nerves. It was Descartes’ articulation of this mechanism for automatic, differentiated reaction that led to his generally being credited with the founding of reflex theory (Wozniak, citing Descartes, Meditations Discourse on Method and Meditations on First Philosophy). Husserl and Merleu-Ponty as they define the â€Å"body† in a different wise, criticizes the Descartes depiction of the body. The latter criticizes Descartes in that human beings do not relate to the body the way it relates to other external objects, such as a table or chair (Merleu-Ponty). Proof of this is the fact that a human being does not move or affect an external object the way he/she moves or affects his/her own body (Merleu-Ponty). Husserl points out that doubting the body already assumes that the body is a mere physical thing (Husserl). Such assumption does not come from philosophical thinking but from the scientific thinking that was prevalent during Descartes’ time (Husserl). Ryle points out: †¦one person has no direct access of any sort to the events of the inner life of another. He cannot do better than make problematic inferences from the observed behaviour of the other persons body to the states of mind which, by analogy from his own conduct, he supposes to be signalled by that behaviour†¦ (p. 16). †¦mental happenings occur in insulated fields known as â€Å"minds†, and there is, apart maybe from telepathy, no direct causal connection between what happens in one mind and what happens in another†¦ The mind is its own place and in his inner life each of us lives the life of a ghostly Robinson Crusoe. People can see, hear and jolt one another’s bodies, but they are irremediably blind and deaf to the workings of one another’s minds and inoperative upon them. (p. 15) On the other hand, materialism is the belief or school of thought that all beings are composed of matter, material force or physical processes (Stack). All events and facts are explainable, actually or in principle, in terms of body, material objects or dynamic material changes or movements. In general, the metaphysical theory of materialism entails the denial of the reality of spiritual beings, consciousness and mental or psychic states or processes, as ontologically distinct from, or independent of material changes or processes. Since it denies the existence of spiritual beings or forces, materialism typically is allied with atheism or agnosticism (Stack). One of the formulations of the materialism is the belief that one rule is reducible to another rule (Stack). This is reflected likewise with the fact that one matter is reducible to another (Stack). For instance, H2O is reducible to hydrogen and water. A chinese sharpie is reducible to animal, dog and crumpled (Stack). In other words, matter as it exists is composed of other formulations of matter. This preservation of causal/explanatory role is reflected in at least one of two ways: (a) the laws in the reduced and reducing theories are similar (this concerns whether they isolate the same covariations in the world) and (b) theoretical-predicate pairs across the reduced and reducing theories isolate, or pick out, the same objects (Churchland; Hooker, cited in http://philosophy.uwaterloo. ca/MindDict/materialism. html). The problem with materialism is that it shuts the possibility of the non-spatial’s existence. There is no attempt, based on the sub-classification of materialism, to reconcile the notion to its principles. Materialism is more persuasive simply because there is empirical data to support the principles that it furthers. There is support with the belief that there are smaller components of matter that form part of other matter. This has already been proven by science. On the other hand, the causal connection between a consciousness and the body, which dualism furthers, while I feel exists is not addressed by materialism. However, the findings and the logic that was used in dualism seem to lack persuasion in it. References Boyd, R. (1980) â€Å"Materialism Without Reductionism: What Physicalism does not Entail,† in N. Block (ed. ), Readings in Philosophy and Psychology, Volume I (pp. 67-106). Cambridge, MA: Harvard University Press. Broughton, J. (2002), Descartes’s Method of Doubt, Princeton. Caroll, R. , Dualism, http://skepdic. com/dualism. html, . Carruthers, P. (1986) Introducing Persons, London, Routledge. Churchland, P. M. (1989) A Neurocomputational Perspective: The Nature of Mind and the Structure of Science. Cambridge, MA: The MIT Press. Crossley, N. (1995) Merleau-Ponty, the Elusive Body and Carnal Sociology, Body and Society 1(1) 43-66. Crossley, N. (1995) Body Techniques, Agency and Intercorporeality, Sociology 29(1), 133-50. Crossley, N. (2001) The Social Body: Habit, Identity and Desire, London, Sage. Curley, E. M. (1999), Descartes Against the Skeptics, Iuniverse. Descartes, R. (1999), Discourse on Method and Meditations on First Philosophy, tr. by Donald A. Cress, Hackett. Descartes, R. (1969) Discourse on Method & The Meditations, Harmondsworth, Penguin. Hooker, C. A. (1981) â€Å"Towards a General Theory of Reduction,† Dialogue 20, 38-59, 201-36, 496-529. Husserl, E. (1972) Experience and Judgement, Evanston, Northwestern University Press. Merleau-Ponty, M. (1962) The Phenomenology of Perception, London, RKP. Putnam, H. (1988) Representation and Reality. Cambridge, Mass. : The MIT Press. Ryle, G. (1949) The Concept of Mind, Harmondsworth, Penguin. Stack, G. (1998) Routledge Encyclopedia of Philosophy, ed. Edward Craig, New York, Routledge. The Cambridge Companion to Descartes, ed. by John Cottingham (Cambridge, 1992). Wozniak, Robert H. (1992) â€Å"Mind and Body: Rene Descartes to William James,† Washington, National Library of Medicine and the American Psychological Association. .

The Portrayal of Native Americans - 781 Words

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The book also talks about how some citizens, whether they be civilians, army personnel, or government officials, sympathized with how Native Americans were being treated, while other white people just wanted them assimilated or terminated completely. One phrase that is used a few times in Killing Custer is â€Å"Nits make lice†, which was said to make it seem okay when innocent women and children were killed in battles between the army and Native Americans, or when they died from the small pox outbreak brought on by whiteShow MoreRelated Portrayal of Native Americans in Film Essay4573 Words   |  19 Pageson the islands that he falsely believed were the Indies. The term Indian spread back to Europe, as did the term Indies, and to this day, Native Americans are known as Indians, and the Caribbean islands are referred to as the West Indies. The Indians populated a much greater area than Columbus could have imagined, covering the land of two Continents. 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