What Is Isobaric Process

An isobaric process is a thermodynamic process in which the pressure remains constant. This is usually obtained by allowing the volume to expand or contract in such a way to neutralize any pressure changes that would be caused by heat transfer. The term isobaric comes from Greek iso, meaning equal, and baros, meaning weight. In an isobaric process, there are typically internal energy changes.  Work is done by the system, and heat is transferred, so none of the quantities in the first law of thermodynamics readily reduce to zero. However, the work at a constant pressure can be fairly easily calculated with the equation: W p * Δ V Since W is the work, p is the pressure (always positive) and ΔV is the change in volume, we can see that there are two possible outcomes to an isobaric process: If the system expands (ΔV is positive), then the system does positive work (and vice versa).If the system contracts (ΔV is negative), then the system does negative work (and vice versa). Examples of Isobaric Processes If you have a cylinder with a weighted piston and you heat the gas in it, the gas expands due to the increase in energy. This is in accordance with Charles law - the volume of a gas is proportional to its temperature. The weighted piston keeps the pressure constant. You can calculate the amount of work done by knowing the change of volume of the gas and the pressure. The piston is displaced by the change in volume of the gas while the pressure remains constant. If the piston was fixed and didnt move as the gas was heated, the pressure would rise rather than the volume of the gas. This would not be an isobaric process, as the pressure was not constant. The gas could not produce work to displace the piston. If you remove the heat source from the cylinder or even place it into a freezer so it lost heat to the environment, the gas would shrink in volume and draw the weighted piston down with it as it maintained constant pressure. This is negative work, the system contracts. Isobaric Process and Phase Diagrams In a  phase diagram, an isobaric process would show up as a horizontal line, since it takes place  under  a constant pressure. This diagram would show you at what temperatures a substance is solid, liquid, or vapor for a range of atmospheric pressures. Thermodynamic Processes In thermodynamic processes, a system has a change in energy and that results in changes in pressure, volume, internal energy, temperature, or heat transfer. In natural processes, often more than one of these types are at work at the same time. Also, natural systems most of these processes have a preferred direction and are not easily reversible. Adiabatic process - no heat transfer into or out of the system.Isochoric process - no change in volume, in which case the system does no work.Isobaric process - no change in pressure.Isothermal process - no change in temperature.

The Decline Of The Black Death - 1949 Words

Amongst the devastation and despair the Black Death left in its wake, it also brought with it some much-needed change to the way medieval Europeans were living. Although it ended many innocent lives, it also began a new era of social and economic living. In the years following the first outbreak of the plague, medical knowledge and awareness of hygiene dramatically improved, as did the living and working conditions of the workers. Other benefits included the rapid growth of Europe’s middle class and thus the fall of the feudal system, the loss of the church’s supreme authority, and the increase in economic power for medieval women. One of the many Economic benefits the Black Plague brought, was a new power for peasants. This meant they were granted higher pay, better working conditions and sometimes more land out in the fields. Prior to the initial outbreak of the Black Death, the people of Europe followed a social hierarchy system called the ‘feudal system’. Under its reign, there were only two main social categories; the rich, wealthy nobles and the poor, powerless peasants. Most of these peasants earned very little, if any pay, for their hard work. Following the Black Death, there were two ways these peasants could become prosperous, either by gaining more vacant land, or demanding higher wages. The Black Death is thought to have wiped out around one-third of Europe’s population of the time, and therefore many blocks of land were left unattended. It didn’t take longShow MoreRelatedThe Role of the Black Death in the Decline of Feudalism Essay2063 Words   |  9 PagesThe feudal sys tem began to decline after the Black Death struck Europe in the late 1340’s. The feudal system joined politics and grouped together the social classes of that period. It began with the â€Å"relationship between two freemen (men who are not serfs), a lord and his vassal. 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SymptomsRead More The black death Essay552 Words   |  3 Pages What was the Black Death, and what was its impact on European society? The Black Death was a bacterium which was carried by flea infested rats. This disaster spread across Europe quite rapidly. Much accusation for the cause of the plague was pressed onto the Jewish community. The most common plague was the bubonic plague, although the pneumatic plague also existed. This disaster caused economic, social, political and cultural havoc. Approximately 50% of the infested population died, which

Learning and Online Communication Samples †MyAssignmenthelp.com

Question: Discuss about the Learning and Online Communication. Answer: Introduction and Chapter One Reflection These kinds of assignments are very interesting to execute. Reflections always lead to introspections and understanding, by questioning myself in regards to what I have learnt from the provided study. I have been fond of accountancy since a very long time. This particular subject has taught me the fundamental principles that are required for being successful in any kind of business. The particular paper aims to identify and assess the business and personal communications that is gradually going online in the regular course of the business proceedings. The interesting part of this study is that the particular way that online communication is taking over global business. Moreover, this is bringing the end users of the commodities and services and the owners of the business closer to each other. However, the first impression that I had gained while going through the assignment is that a huge amount of information that has been presented in the introduction and chapter one was more than enough to understand and retain at once. However, as I proceeded with the reading I found the piece of literature interesting and easy to understand. Thecloud accounting software packages that have been developed in the modern world are taking over theaccounting business globally. The knowledge in regards to online communication that I have acquired from this particular chapter has helped me to understand the benefits of online communication and the ways in which I can implement them in case of a business of my own. Moreover, I came to know about the disadvantages of online communication. Initially I used to think that there are no disadvantages to online communication. I thought that the only reason for business firms not undertaking the online communication for innovating the accounting and other related business proceedings was that the lack of enough capital for the implementation of the online processes. However, there are certain disadvantages to online communication. The people who do not have a knack for writing or have poor keyboard facilities cannot facilitate online communication. Moreover, certain potential risk like the risk in relation to information overload is a significant feature of online information. I understand this problem because I had been confronting similar situation in the past when I had received a mail in regards to a situational analysis. I did feel that too much information had been communicated and there was no one present to help me out with my confusion. Moreover, I came to know about the famous accounting software like the MYOB, Xero, Oracle, ERP and SAP. Moreover, the trends in regards to the online communication can be understood by the introduction of the smart phones in the market, which led to a global revolution in terms of connectivity through internet. The fact that an individual with an average income could afford to get the net connection that would connect him to the entire world. In other aspects, I came to know that learning is not just about understanding but about conceptualizing the acquired knowledge and changing as a person in regards to the new knowledge acquired. I feel that this is true because learning for me until now have been restricted to the examination papers. As long as I could rightly remember and deliver the acquired knowledge in the answer sheet, I was satisfied with whatever I had learnt. It is now that I understand that the worth of learning depends on the retaining of the acquired knowledge and not just delivery of the same. The fundamental concepts of finance has also been summarized and explained in this particular chapter. The particular area that interested me in regards to finance is the significance of the aspect of double entry accounting. Previously, I used to think it is just a technique which was adopted for posting the various transactions in the books of accounts. However, I came to know that the aspect of double entryaccounting was just not limited to that. Double entry accounting is the fundamental foundation of every accounting process and facilitates accurate financial proceedings. I have also been fascinated to know that the very core word of accounts that is debit and credit has been adopted from Latin. This means that the Latin word for debit is debere meaning to owe and that for credit is credere meaning to entrust. Moreover, another principle that I have acquired from this particular reading is that the equity of a firm is equal to the assets of the firm after the total amount of the liabilities have been deducted from the same. The formula can be expressed as: Equity = Assets Liabilities Therefore, the study guide had helped me to understand and explore the basics of the accounting process. moreover,, I have understood the particular difference between learning and retaining the concept that is being learned. Thus, it can be concluded that I now feel confident for the future endeavors in regards to this particular subject.