experiment is to determine the enthalpy of combustion of naphthalene by means of a bomb calorimeter. First‚ the bomb calorimeter was standardized using benzoic acid and the average heat capacity of the bomb calorimeter was calculated to be 10.60.3205 kJ/K. From that‚ the These results show that heats of combustions of unknown substances can be determined via bomb calorimetry. Introduction The first law of thermodynamics states that energy is conserved.2 Using that law it can be said that the change
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Hello kj k k k k l l kj j h k k l; k jk ll; klj lkjlkj lkjkl jkljlj; lklk;k;k ;lkk;l k;l;lk;l k; lkl;kgjh gh jhgjhg jgjh hgjhhg gjh h h h h h h hhh g g f dd d d d f g tr w s cv g r e w sd v g e e d v g g g f f f f f d d e e d d d d dd d d d d d d d d LABU 2051Fall 2012 Assessment Criteria for ACCT Position Paper |Task Completion |Organization |Language Use | |Choice of Focus
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Hypothesis: I believe that alcoholic compounds with bigger relative formula mass will release more energy in combustion reaction than the less alcoholic hydrocarbons compounds. Equipment: Different types of alcohols in spirit burner (CH4‚ C2H6‚ C3H8‚ C4H10‚ C5H12)‚ Thermometer‚ water‚ beaker‚ scale‚ measuring cylinder‚ tripods‚ clamp‚ gauze‚ heat mat‚ lighter or matches. Hazard: Most of alcohol we using are flammable‚ irritant‚ toxic and harmful. 1 provide spirit burners which have removable
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Experiment 15 Title: Equilibrium studies Objective: 1. To study the effect of concentration and temperature changes on equilibrium. 2. To predict the direction of the net reaction in an equilibrium system by Le Chatelier’s principle. Results: Part 1 (a): Effect of temperature changes on equilibrium Cu(NO3)2 (aq) Cu(NO3)2 (s) The color of the solution = dark blue with precipitate When placed in water bath 60oC When placed in ice bath The level of the solid
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AP Chemistry Final Exam Review ESSAY. Write your answer in the space provided or on a separate sheet of paper. 1) Explain the difference between a qualitative and a quantitative measurement. Provide examples to illustrate this difference. Answer: A qualitative measurement is a measurement that gives descriptive‚ nonnumeric results; a quantitative measurement is a measurement that gives definite‚ usually numeric results. "The rock is heavy" would be a qualitative measurement. "The rock weighs 110
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What are five key limitations to the theory of comparative advantage? Question 5 XYZ Breweries of Kilimanjaro‚ Tanzania‚ has received an order for 10‚000 cartons of beer from KJ Importers of Kigali‚ Rwanda. The beer will be exported to Rwanda under the terms of a letter of credit issued by a Kigali bank on behalf of KJ Importers. The letter of credit specifies that the face value of the shipment‚ $720‚000‚ will be paid 90 days later after the Kigali bank accepts a draft drawn by XYZ Breweries
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Daily Expenditure 19 7.4 Weight Statistics 20 1 Abstract This report contains data and findings in relation to my lifestyle habits‚ food intake and exercise regime. Throughout the report‚ information relating to dietary (kJ) intake‚ exercise (kJ) expenditures‚ healthy eating and health concerns for the youth of Australia will be discussed. Also provided within the report are discussion and findings around my profile (discussing the data in depth). While also providing recommendations
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1. Which of the following sets of horizontal forces could leave an object in equilibrium? a. 25‚ 50 and 100 N b. 5‚ 10‚ 20 and 50 N c. 8‚ 16‚ and 32 N d. 20‚ 20 and 20 N 2. Which of the following sets of horizontal forces could not leave an object in equilibrium? a. 6‚ 8 and 10 lb b. 10‚ 10 ‚ and 10 lb c. 10‚ 20 and 30 lb d. 20‚ 40 and 80 lb 3. If an object is free to move in a plane‚ the number of scalar equations that must be satisfied for it to be in
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energy internally‚ and in either case it is measured in Joules or kilocalories (often called "Calories" and written with a capital Cto distinguish them from little ’c’ calories). Carbohydrates and proteins provide 17 kJ approximately (4 kcal) of energy per gram‚ while fats provide 37 kJ (9 kcal) per gram.‚[17] though the net energy from either depends on such factors as absorption and digestive effort‚ which vary substantially from instance to instance. Vitamins‚ minerals‚ fiber‚ and water do not provide
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will release approximately - 57 kJ/mol of energy on neutralisation with strong base. This energy release is due to the formation of water molecules from the H+ ions from the acid reacting with the OH- ions from the base. H+(aq) + OH-(aq) H2O(l) When a weak acid is neutralised some of the energy is needed to dissociate the molecules to make the hydrogen ions available for neutralisation. The result is a value for neutralisation enthalpy lower than - 57 kJ/mol (numerically lower‚ not more
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