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Gen Chem Exam 2 answerkey

Gen Chem Exam 2 answerkey - V25.0101 General Chemistry I...

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1 V25.0101 General Chemistry I Exam #2 March 26, 2010 Name: ___________________________________________________________________________________ ID Number: N Recitation instructor: _______________________________ There are six (6) questions on nine (9) pages. Partial credit cannot be given unless you show all work. Clearly indicate your answers, show their units, and use the proper number of significant digits. When you begin, verify that your exam is complete. Notify a proctor if you are missing any pages. Problem Value Score 1 15 2 24 3 16 4 10 5 21 6 14 Total 100
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2 (15pts) 1. Define the following terms: (a) IE 1 First ionization energy the energy required to remove (to infinity) the first/initial outermost electron in the atom or molecule when the gas atom or molecule Ionization energy is also a periodic trend within the periodic table organization. Moving left to right within a period or upward within a group, the ionization energy generally increases. (b) Enthalpy H, a thermodynamic property H = E + pV It can be used to calculate the heat transfer during a quasistatic process taking place in a closed thermodynamic system under constant pressure (isobaric process). Change in enthalpy ΔH is frequently a more useful value than H itself. (c) Uncertainty principle Heisenberg uncertainty principle states that certain pairs of physical properties, like position and momentum, cannot both be known to arbitrary precision.
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