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5 solutions

Boltzmann Equation

Q. Referring to the setup in Figure 14.2, determine the number of possible arrangements, W, and calculate the entropy before and after the removal of the barrier the number of molecules is (a) 10, (b) 50, (c) 100

Solved • Feb 22, 2020

Boltzmann Equation

Q. An oxygen (O2) molecule is absorbed onto a small patch of the surface of a catalyst. It's known that the molecule is absorbed on 1 of 225 possible sites for adsorption (see sketch at right). Calculate the entropy of this system. Round your answer to 3 significant digits, and be sure it has the correct unit symbol.

Solved • Feb 22, 2020

Boltzmann Equation

Q. For n-pentane, C5H12, the heat of vaporization at its normal boiling point of 36 °C is 25.8 kJ/mol. The entropy change when 1.55 moles of C5H12 vapor condenses at 36 °C, 1 atm is _____ J/K.

Solved • Feb 19, 2020

Boltzmann Equation

Q. The following relationships regarding entropy (S) and the number of microstates in a system (W) are true at 0 K: a. S = 0, W = 0 b. S = 1, W = 0 c. S = 0, W = 1 d. S = 213.7, W = 7.69 x 1034 e. S = -213.7, W = 7.69 x 1034

Solved • Jan 16, 2020

Boltzmann Equation

Q. Determine the entropy change, ΔS (in J/K), if the particles are initially evenly distributed between the two boxes, but upon redistribution they end up according to distribution (b). (Enter an unrounded value.)

Solved • Dec 6, 2019