Find a Reactions Final Temperature With Specific Heat

Find a Reaction's Final Temperature With Specific Heat This example problem demonstrates how to calculate the final temperature of a substance when given the amount of energy used, the mass and initial temperature. Problem 300 grams of ethanol at 10  °C is heated with 14640 Joules of energy. What is the final temperature of the ethanol? Useful Information: The specific heat of ethanol is 2.44 J/g ·Ã‚ °C. Solution Use the formula q mcΔT Where q Heat Energym Massc Specific HeatΔT Change in temperature. 14640 J (300 g)(2.44 J/g ·Ã‚ °C)ΔT Solve for ΔT: ΔT 14640 J/(300 g)(2.44 J/g ·Ã‚ °C)ΔT 20  °CΔT Tfinal - TinitialTfinal Tinital ΔTTfinal 10  °C 20  °CTfinal 30  °C Answer:  The final temperature of the ethanol is 30  °C. Final Temperature After Mixing When you mix together two substances with different initial temperatures, the same principles apply. If the materials dont chemically react, all you need to do to find the final temperature is to assume that both substances will eventually reach the same temperature. Problem Find the final temperature when 10.0 grams of aluminum at 130.0  °C mixes with 200.0 grams of water at 25  °C. Assume no water is lost as water vapor. Solution Again, you use q mcΔT, except you assume qaluminum qwater and solve for T, which is the final temperature. You need to look up the specific heat values (c) for aluminum and water. This solution uses 0.901 for aluminum and 4.18 for water: (10)(130 - T)(0.901) (200.0)(T - 25)(4.18)T 26.12  °C

What Is Oxford Referencing

What Is Oxford Referencing What Is Oxford Referencing? Many schools recommend Oxford referencing for citing sources in academic writing. But what exactly is this system? And how does it work? In today’s blog post, we look at the basics of Oxford referencing. Q1: What Is Oxford Referencing? Oxford referencing is a footnote and bibliography system. This means   you should give citations in footnotes, indicated with superscript numbers: Usually at the end of a sentence, like this.1 The first footnote for each source should include full publication information, as well as a pinpoint reference (i.e., the specific page or section cited). And although you provide the source information here, you will also need to list it in the bibliography at the end of your document. Q2: Where Can I Find the Rules for Oxford Referencing? Technically, â€Å"Oxford referencing† is not a system so much as a group of related citation styles (otherwise known as the footnote–bibliography style). Consequently, there aren’t any â€Å"official† rules for Oxford referencing. Your best bet is to check your school’s style guide, which should specify the rules to use. There are plenty of online sources, too, but these might differ from the version preferred by your institution. Ultimately, if your referencing is clear and consistent, slight variations shouldn’t matter too much. But it never hurts to check whether your school has a style guide available. Q3: What Goes in Footnotes? As above, this depends slightly on the version of the system you’re using. It also depends on the source type (e.g., book, website, video). But in general, the key details to include are: Author’s name Title of the book, article, or web page Title of the journal, website, or edited book Place of publication Date of publication Page or section numbers For online sources, you should also give a URL and a date of access. Repeat citations of the same source, meanwhile, will typically use either Latin abbreviations (e.g., ibid., op. cit., loc. cit.) or a shortened citation format. For example, we could use the following shortened citation style: 1. C. Alexander, Mrs Chippy’s Last Expedition: The Remarkable Journey of Shackleton’s Polar-Bound Cat, London, Bloomsbury, 1991, p. 24. 2. A. Moretti, Cats of the Internet [website], 2014, www.felinesonline.com/gallery, accessed June 6, 2017. 3. Alexander, p. 30. Here, for example, we’ve shortened the third citation to just the author’s surname and a page number. And as long as we only cite one source by â€Å"Alexander† in the document, this will be enough for the reader to know which source we’re citing each time. Q4: How About the Bibliography? Bibliography entries in Oxford referencing are usually similar to the first footnote citation for the same source. The main differences are that: You do not need to give a pinpoint reference. Give the first named author’s names surname first (e.g., â€Å"Smith, S.† instead of â€Å"S. Smith†) so that you can list sources by author surname. For example, we would list the entry for the book in the example above as: Alexander, C., Mrs Chippy’s Last Expedition: The Remarkable Journey of Shackleton’s Polar-Bound Cat, London, Bloomsbury, 1997. Q5: What Does Any of This Have to Do with Oxford? Very little. It is sometimes associated with the University of Oxford, but it’s not the only referencing system used there. However, most versions of Oxford referencing are variations of the footnote and bibliography system set out in the OUP’s New Oxford Style Manual.