Energy content is an important property of food. The energy your body needs for running‚ talking‚ and thinking comes from the food you eat. Energy content is the amount of heat produced by the burning of 1 gram of a substance‚ and is measured in joules per gram (J/g). Usually‚ fat-rich foods like peanuts and cashews provide more energy than just carbohydrates like marshmallows. You can determine the energy content by burning a portion of food and capturing the heat released to a known mass of
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conformations‚ the methyl groups are more shifted and the potential energy difference is 18.2 kj/mol. At 120⁰ and 240⁰‚ eclipsed again‚ the energy rises to -4.6788 kj/mol‚ from its previous -17.721 kj/mol‚ the hydrogens can be found lying on the same plane‚ increasing the energy. Yet‚ the energy is not as high as it is at 0⁰ and 360⁰. For it to reach its Emax‚ at 0.5593 kj/mol‚ energy will have to increase by 5.23 kj/mol. At 180⁰‚ there is an Emin‚ which demonstrates the methyl groups being furthest apart
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Just Rude? By KJ DELL’ANTONIA “you have to consider the other person’s point of view instead of getting wrapped up in your own discomfort. This means that it is not always about you. Courtesy is interacting with those outside our social sphere. It also means being gracious to those who are near and dear to us. Lastly‚ being courteous helps our sense of self worth. Courtesy is interacting with those outside our social sphere. According to the article “Am I Introverted‚ or Just Rude? By KJ DELL’ANTONIA
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Chemical Engineering Laboratory Ш SEGi University Experiment: Air Conditioning Module Candidate’s Name: Yeap Swee Sean Student ID: SCM-025695 Lecturer: Ms. Chan Yi Shee Date of Submission: 28th November 2013 1. Abstract The main purposes of this experiment are to allow students to get familiarized with air conditioning system and also to obtain experimental data so that the state point can be plotted on a psychrometric chart. The apparatus used in this experiment are SOLTEQ air-conditioning
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Alkanols Heat of Combustion Aim: To determine the molar heat of combustion of methanol‚ ethanol and 1-propanol Materials: 3 spirit burners‚ one containing methanol‚ one containing ethanol and one containing 1-propanol. A thermometer A copper calorimeter 100 ml measuring cylinder Retort stand and clamps Stopwatch Matches Electronic balance Safety assessment: This experiment contains flammable materials remove loose clothing such as ties which could be set alight
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Calculate the work done when a mass of 20 kg is lifted vertically through a distance of 5.0 m. Assume that the acceleration due to gravity is 9.81 m/s2 . 6. Water is pumped vertically upwards through a distance of 50.0 m and the work done is 294.3 kJ. Determine the number of litres of water pumped. (1 litre of water has a mass of 1kg). 7. Determine the work done when a force of 50 N pushes an object 1.5 km in the same direction as the force. 8. Calculate the work done when a mass of weight
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Thermochemistry Laboratory Report Abstract The purposes of these three experiments are to determine the heat capacity of a calorimeter and with that data‚ confirm Hess’s Law and observe enthalpy changes within reactions. By measuring the change in temperature that occurs with the interaction of two different reactants‚ we were able to determine both the calorimeter constant and the change in enthalpy of a given reaction. The results were rather mixed‚ as some numbers more closely resembled the
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Objectives: 1. Distinguish between system and surroundings. 2. Distinguish between heat energy and temperature. Name the SI units of temperature and thermal energy. 3. Calculate the heat content (thermal energy) of a substance using its specific heat‚ temperature and mass. 4. Solve calorimetry problems. 5. Name the energy associated with a change of state and calculate the energy required to change a given mass of substance from solid to liquid or liquid to gas. 6. Describe the changes in the microscopic
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Reaction Enthalpy Curtis M. Franklin Thursday‚ February 14‚ 2013 ABSTRACT An ice calorimetric measurement was used to determine that a reaction involving solid magnesium metal and 1.00M sulfuric acid produces an experimental a value of ∆H = -226 ± 28 kJ/mol at 0°C. This is about 48.4% lower than the expected value reported at 25°C. Introduction Many chemical reactions exhibit themselves by exchanging heat energy‚ either be absorbing heat or releasing it‚ this heat is energy lost or produced
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CM 1401 Practice Trial This paper consists of 5 MCQ and 5 free r esponse questions. Complete all the questions below. 1) For H Atom‚ select the on e that best represent the electron level diagram. a . S b. c. d. none of the above ( ) Choose 2) Which of the following is fa lse about MO theory? a) no. of atomic orbital formed will be the sam e as the
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