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Approaching Diesel Fuel Quality in Chemistry Lab Classes: Undergraduate Student's Achievements on Determination of Biodiesel Content in Diesel Oil Applying Solvatochromic Effect
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Cavalcante dos Santos, Rafael; Cavalcanti, Juliane Natalizi Cabral; Werneck do Carmo, Elisa Carneiro; de Souza, Fernando Costa; Soares, Wesley Garcia; de Souza, Cristiane Gimenes; de Andrade, Débora França; d'Avila, Luiz Antonio – Journal of Chemical Education, 2020
An experimental procedure is presented that was developed by fifth-year chemical engineering and industrial chemistry undergraduates at the Federal University of Rio de Janeiro doing the discipline on Experimental Organic Technology. The aim of this study was to apply the solvatochromic effect of the dye Nile Blue chloride to the characterization…
Descriptors: Science Instruction, College Science, Undergraduate Study, Chemistry
Determining the Speed of Sound and Heat Capacity Ratios of Gases by Acoustic Interferometry
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Varberg, Thomas D.; Pearlman, Bradley W.; Wyse, Ian A.; Gleason, Samuel P.; Kellett, Dalir H. P.; Moffett, Kenneth L. – Journal of Chemical Education, 2017
In this paper, we describe an experiment for the undergraduate physical chemistry laboratory in which students determine the speed of sound in the gases He, N[subscript 2], CO[subscript 2], and CF[subscript 3]CH[subscript 2]F. The experimental apparatus consists of a closed acrylic tube containing the gas under study. White audio noise is injected…
Descriptors: Science Instruction, College Science, Undergraduate Students, Chemistry