1. Which of the following statements about heat is false? A) If heat flows into a system‚ the extra energy of the system appears in the form of internal energy. B) A hot object possesses more heat than a cold object. C) If the system and surroundings are in thermal equilibrium‚ there is no heat flow between them. D) A process in which heat flows out of a system is said to be exothermic. E) Heat is a form of energy flow. B is false. If you compare a cup of water at 25oC and a bath tub of
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banana oil‚ which is used in flavor industries. The equilibrium of the reaction was changed by adding an excess amount of acetic acid. The reaction was refluxed and product was purified by extraction and distillation. Isopentyl acetate was analyzed by infrared spectroscopy and 1H NMR spectroscopy. Reaction Scheme: Mechanism: Key features of the Fischer Esterification mechanism are: a. protonation of the carbonyl group‚ b. the formation of the tetrahedral intermediate‚ and c. regeneration of acid
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yield. Some of the loss of product could be due to the constant transfer of the solution. Throughout the experiment the solution was moved from the flask to the vacuum filter‚ and then to another flask some of the loss could have happen there. The infrared spectrometry results we can conclude that the substitution pattern of the product. The black line indicated the starting reaction and the red line indicated the product. For the most part of the diagram the lines line up except during the aromatic
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The easiest way to implements this is Infrared (IR) vision. Cameras with IR night vision have small LED bulbs around the lens of the camera. These bulbs emit Infrared light and floods the field of view of the camera enabling it to see even when it is completely dark. However‚ human eye cannot see IR light so this light "flooding" goes unnoticed to the
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Water memory Water memory is the claimed ability of water to retain a "memory" of substances previously dissolved in it to arbitrary dilution. No scientific evidence supports this claim. Shaking the water at each stage of a serial dilution is claimed to be necessary for an effect to occur. The concept was proposed by Jacques Benveniste to explain the purported therapeutic powers of homeopathic remedies‚ which are prepared by diluting solutions to such a high degree that not even a single molecule
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Athlete’s foot is an infection caused when fungi invade the skin. It occurs on the bottom of feet and/or between toes and is highly contagious. If left untreated‚ it can: • Spread to other parts of the body • Invade and destroy the nail plates of your toenails • Hinder athletic performance Symptoms include burning‚ itching‚ cracking and scaling. How’d I get it? It’s most commonly picked up by walking barefoot in a locker room‚ public pool or shower area. People are most susceptible when their feet
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”TOUCH SCREEN TECHNOLOGY” A seminar report submitted in partial fulfillment of the requirements for the degree of Bachelor of Engineering by KIRAN M. MALANG (GR No. 101001 M-28) Under the guidance of Prof. Abhay M. Chopde and Prof. Bharat R. Rathi DEPARTMENT OF ELECTRONICS ENGINEERING VISHWAKARMA INSTITUTE OF TECHNOLOGY PUNE 2012 - 2013 Bansilal Ramnath Agarwal Charitable Trust’s VISHWAKARMA INSTITUTE OF TECHNOLOGY‚ PUNE - 37 ( An Autonomous Institute Affiliated to University
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Experiment 3: The preparation of acetaminophen (paracetamol) with thin layer chromatography (TLC) to monitor the reaction. Abstract: This experiment is to demonstrate the preparation of paracetamol and its properties. Reflux and filtration of 4-aminophenol and acetic anhydride formed the crude sample. Further analysis of dry white crystals were used to give quantitative measurements and a percentage yield of 46% was obtained. The overall conclusion is that the acetic anhydride reacted with the
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g of n-octanol. The theoretical yield was 23.8 g of octyl acetate. The percent yield was 59.2%. The purification of the final ester was confirmed by boiling point (186-199°C) and infrared index (nD=1.419). It was a colorless liquid that had a slight fragrance of orange and indescribable chemicals. The Infrared spectra confirmed ester peaks: two C-O peaks at 1045cm-1 and 1241cm-1 and C=O at 1746cm-1 . Introduction: In this experiment‚ acetic acid and n-octanol will be used to prepare an
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product was then isolated and recrystallized using methanol. This reaction is an example of an electrophilic aromatic substitution reaction‚ in which the nitro group replaces a proton of the aromatic ring. Following recrystallization‚ melting point and infrared were used to identify and characterize the product of the reaction. Purpose: The purpose of this experiment is to synthesize methyl nitrobenzoate from methyl benzoate‚ concentrated nitric acid‚ and concentrated sulfuric acid via an electrophilic
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