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Tutorial #4 - Thermochemistry Sem 2 2016.pdf - UNIVERSITY...

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UNIVERSITY OF TECHNOLOGY, JAMAICADIVISION OF CHEMISTRYGROUPS:DN-1, MT-1, EH-1, AS-1, B-ENG, OHS, SEMODULE:GENERAL CHEMISTRY (CHY2021)Unit # 6DATE:March 7-11, 20161.a.State the first law of thermodynamicsb.Differentiate between thermal and heat energyc.Differentiate between an isolated and a closed system. Use a supporting example.d.Differentiate between internal energy of a system and its enthalpy.2.Define the following terms, and write suitable reactions for each definitiona.Bond dissociation enthalpyb.Lattice energyc.Enthalpy of formationd.Enthalpy of sublimatione.Enthalpy of electron affinity3.What is the change in the internal energy,U, of a system that releases 2,500 J of heat andthat does 7,655 J of work on the surroundings at constant pressure?4.When20 gofAl (s)at98oCis placed in50 gofH2O, the final temperature is26.5oC.was theinitial temperature ofH2O? Given:CspAl(s)= 0.903 J/goC andcspH20(l) = 4.18 J/goC.What

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Term
Fall
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Tags
Thermodynamics, Enthalpy, Energy, Heat, kJ mol 1, a Bond

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