created and destroyed causing energy to be released or absorbed. In a constant pressure‚ like in the coffee cup calorimeter‚ the change in energy equals to the enthalpy change of the reaction. Because enthalpy change of the reaction equals to the specific heat times the mass times the change in temperature‚ the amount of heat released or absorbed can be determined by measuring the change in temperature. If the enthalpy change is negative then the reaction is exothermic and if the enthalpy change is
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Tmaximum - Tminimum = 45 – 20 = 25 0C * Calculate the number moles of copper sulphate reacted: number of moles = concentration x volume = 0.5 x 0.025 = 0.0125 mol * Calculate energy released during the reaction (Q): Q = mass of CuSO4 x specific heat capacity x ΔT = 25 x 4.2 x 25 = 2625 J * Calculate ΔH for the reaction (energy change is negative because the reaction was exothermic): ΔH = -Q / number of moles = 2625 / 0.0125 = 210 kJmol-1 ‘Absolute Uncertainty’ = abs/unc ‘Percentage
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burnt out. | The amount of water will be the same for each material. The starting temperature of the water will be the same for each material.The materials will be the same distance away from the boiling-tube. | Results: (4.2 is the value of the specific heat capacity of water‚ in joules per gram per degree Celsius – the number of joules taken to raise the temperature of water by 1 °C. 1 cm3 of water has a mass of 1 g. If the number is more than 1000 J/g‚ express it as kilojoules kJ) Table 2.
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Specific Learning disorder refers to academic performance that is substantially below what would be expected given the person’s age‚ IQ score‚ and education. In the article “Psychoactive Medication and Learning Disabilities”‚ it focuses on the academicals and social behavioral effects of Ritalin and Dexedrine‚ which are psychoactive medications. It is a case study on David‚ a seven years old boy who showed characteristics of ADHD and learning disabilities. His IQ score was 62 according to the Stanford-Binet
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1. | | | What is the pressure‚ in atm‚ of a tank of gas with a regulator that reads 1250mmHg? | | | Student Response | Correct Answer | A. | 1.64 | | B. | 490 | | C. | 1.79 | | D. | 0.608 | | E. | 1.25 | | | Score: | 0/1 | | | 2. | | | A 147.9-L sample of dry air is cooled from 88.0°C to 22.1°C while the pressure is maintained at 2.85 atm. What is the final volume in L? (Do not type the units.) | | | Student Response | Correct
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Topic: Bans on the Pit Bull Terrier General Purpose: To argue Specific Purpose: To argue that there should not be bans on Pit Bull Terriers Thesis Statement: Bans on Pit Bull Terriers should not exist because; (1) Pit Bull breed are not any different from other dog species; (2) most evidence condemning the Pit Bull is inaccurate or a skewed regurgitation from the media; and (3) a ban would‚ and has‚ caused more work and regulations than necessary. Introduction I. [Attention Getter] As of now
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SPOTTING EFFECT Specific Objective: Test for the presence of lipids by means of locating translucent spots/area in the filter paper. B. SOLUBILITY Specific Objective: To test for the solubility of the suspected lipid-containing samples. C. TEST FOR UNSATURATION (BROMINE WATER TEST) Specific Objective: To test for unsaturation of lipids through a change in colour or discoloration of the bromine water. To test for the presence of carbon-carbon double bonds. D. ACROLEIN TEST Specific Objective:
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Hoang Ngo Lab 6 report Anita Dey Thursday 8am Abstract: We recently performed a liquid nitrogen experiment in finding the Latent heat of the substance. We isolated two parts of the experiment in order to find out how much evaporation of the liquid nitrogen was from the surroundings B and how much evaporation from the electricity G. 1. When a substance is undergoing a phase transition‚ more heat (energy) is being added to the Substance but its temperature (a way of measuring its energy) is not
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1.Specific Features of Financial Services Marketing It has been suggested that there are two characteristics‚ which are specific for financial services marketing. The first one would be fiduciary responsibility and the second one is the two-way information flows. 1.1Fiduciary Responsibility Fiduciary responsibility is one of the most important features within the financial sector. It has been described through Arthur Meidan as "the responsibility of any financial services organisation to guard
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acts of abuse. • Diversity-the person wouldn’t be ale to express there own identity‚ or culture. 1.2 When working in the care setting how you interact with others is very important‚ your role has a huge impact on a person when they have specific communication needs‚ and in your role you should support the person with everyday life. As a care assistant you may have a problem communicating with the person if you do not fully understand the needs of the individual. 1.3 In the care setting
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