Investigating The Total Heat Energy Released - 1963 Words

Data Analysis In order to determine the total heat energy released by each of the fuel sources, a graph will need to be constructed to demonstrate the change in the temperature of water over the entire duration of the experiment. From this graph, a linear trendline will be created for the last 3 data points where the water was allowed to cool, which can be extrapolated backwards to determine the total decrease in the temperature of the water due to a loss of energy to the surrounding environment during the combustion of the fuel. The difference between the highest and lowest temperature values will then be used to calculate the total change in the temperature of water during the combustion of the fuels. Below, one representative graph and†¦show more content†¦Density of water = mass of watervolume of water mass of water = (0.998 g cm-3)(80.0 mL  ± 0.5 1cm31 mL) , given that the density of water at 20.1  °C is 0.998 g cm-3 mass of water = (0.998 g cm-3)(80.0 cm3  ± 1%) mass of water = 79.8 g  ± 1% mass of water = 79.8 g  ± 0.8 q=mcT q=(79.8 g  ± 0.8) (4.18 Jg-1K-1)(71.8 K  ± 0.2), given that the change in temperature, in  °C, is equivalent to the change in temperature in K. q=(79.8 g  ± 1%) (4.18 Jg-1K-1)(71.8 K  ± 0%) q = 23900 J  ± 1% q = 23900 J  ± 200 q = 23900 J  ± 200 1kJ1000J q = 23.9 kJ  ± 0.2 Sample calculation 3: calculations performed to determine the total heat energy released per mole of the kerosene during its combustion for the first trial. Energy per mole = q(initial mass of spirit lamp with kerosene- final mass of spirit lamp with kerosene) MM of kerosene Energy per mole = 23.9 kJ  ± 0.2 (115.93 g  ± 0.01 - 114.45 g  ± 0.01) 170.38 g mol-1 , given that the main hydrocarbon in kerosene is C12H26 Energy per mole = 23.9 kJ  ± 1% 1.48g  ± 1% 170.38 g mol-1 Energy per mole = 2750 kJ  ± 2% Energy per mole = 2750 kJ  ± 50 The final values for the energy per mole for all trials can be averaged to reduce random experimental error. Once the calculations above are repeated for all fuel sources, the summarized results can be shown, in comparison to literature values for the heat of combustion to determine the most

Definition and Heroism Essay Assignment free essay sample

Your assignment is to write a multi-paragraph essay that defines your concept of heroism. You will use various strategies of deflation (definition by function, example, and negation) to explain your unique opinion on the concept. Steps Preprinting/Planning 1 . Revisit your responses to the Essential Question: What defines a hero? You may ask yourself, To what extent or to what degree can a person or an action be heroic? 2. Next, categorize your Ideas on a graphic organizer, and brainstorm details that will support your ideas.Details may come from texts (fiction, nonfiction, film), your own experiences, and historical or current society. Drafting 3. Introduce your ideas by providing a hook, context, and a thesis (your Ideas should move from general to specific). One way to draw your reader Into the essay Is to use a quotation related to the concept. To conceptualize your thesis; you might discuss commonly held beliefs about heroism that do not match your definition. We will write a custom essay sample on Definition and Heroism Essay Assignment or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page This allows you to point out the weaknesses in those definitions in comparison to yours. 4. Use a variety of definition strategies to define heroism as you draft the body paragraphs of our essay.Consider organizing each paragraph around a different strategy. Remember: using the function strategy demonstrate how heroism functions or operates In the real world. And using the example strategy use examples to help the reader understand your definition. These examples often come from texts. *Paragraphs using the negation strategy explain what something is by showing what it is not. Using negation helps to contrast your definition with others definitions. 5. Draft a conclusion that leaves the reader with a final Impression about your definition. The conclusion of a definition essay often ends by focusing on the question: So what? It encourages the reader to accept the definition you presented. Revising 6. After you have written an initial draft of your essay, go back to your thesis. Does your definition reflect your unique opinion? Is your thesis clearly stated In the Introduction of your essay? Strategies of definition. Using more than one strategy of definition allows you to use a wide range of examples. Can your reader relate to your examples? Do you use enough examples to help the reader understand your unique point of view? 8. Consult the Scoring Guide to ensure that you have met specific criteria. Editing for Publication.