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1. Consider treating polyenes, ethylene, butadiene, hexatriene, etc., with the one-dimensional particle-in-the-box model. What length polyene (i.e., number of C atoms) is required to absorb light in the red region of the spectrum? How does that compare with the conjugated portion of carotene? 2. Again using the particle-in-the-box problem, predict in eV the first IP and electron affinity of hexatriene. What temperature would be needed to achieve 10% population of the normally lowest unoccupied molecular orbital (LUMO)? 3. Consider an electron in one, two, and three dimensional boxes with a side of 4 A. How does the zero-point energy vary with increasing dimension?
calculate the molar solubility of silver iodide in 3.0 M NH3. overall formation constant for Ag(NH3)2" is 1.7 x 10^7
A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by
oes this result mean that the change in enthalpy of this process must be negative in order for the process to be spontaneous under standard state conditions? How come?
draw the molecule 1-(4-methoxyphenyl)-2-methylpropan-1-ol. number the carbons on the molecule and identify all the functional groups characterized by the molecules name.
A.E. Dyer supplied 45.9 cal of heat energy to a 156-g piece of aluminum block that was kept at 28 degree C. What is the final temperature of the aluminum block?
For the reaction: H2(g) + CO2 (g) X CO(g) + H2O(g) Kc= 0.771 at 750 degrees C. Consider the situation where we have 0.50 mol of each reactant and product in a 1 L. Is the reaction at equilibrium (prove your answer mathematically using Q)?
What mass of MgCl2 in grams must be added to 1.00 kg of water to prouce a solution that boils at 103.0 degrees celsius
Assume that the heat of combustion of benzene is -4.18 x 103 kJ/mol. Enter your answer with three significant figures in exponential format (1.23 x 104 = 1.23E4).
What is the molarity of an aqueous solution containing 75.3 g of glucose (C6H12O6, mol wt = 180 g/mole) in 35.5 mL of solution
What is the final temperature of the water when equilibrium is reached? (Assume a density of 0.998 (g/mL) for water.)
How can integral dQrev/T vanish when integrated around a cycle while the cyclical integral of dQrev remains finite
Estimate how long it will take for the bleach molecules to diffuse through the extent of the room, assuming that the bleach bottle is in the center of the room, and the room is perfectly square, and is a 10 foot x 10 foot room.
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