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Halpern, Arthur M.; Noll, Robert J. – Journal of Chemical Education, 2019
A spreadsheet-based exercise for students is described in which they are challenged to explain and reproduce the disparate temperature dependencies of the heat capacities of gaseous F[subscript 2] and N[subscript 2]. For F[subscript 2], C[subscript p,m] increases from 300 K, reaches a maximum at 2200 K, and then decreases to 74% of the maximum…
Descriptors: Chemistry, Spreadsheets, Learning Activities, Molecular Structure
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Agrawal, D. C.; Menon, V. J. – European Journal of Physics, 2009
A model of an endoreversible Carnot engine is considered where the piston moves with a constant speed "u." Expressions for the cycle time [tau] for the four branches, as well as output power, P[subscript W], are derived and the optimized root for maximum power is obtained in closed form. Our results are discussed in terms of the isothermal…
Descriptors: Engines, Thermodynamics, College Science, Science Instruction