Ch11 HW2

# Ch11 HW2 - WebAssign Ch11 HW2(Homework Current Score 16 out...

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Arthur Barfield PHYS 2211, section M, Fall 2008 Instructor: Jennifer Curtis Web Assign Current Score: 16 out of 16 Due: Wednesday, December 3, 2008 09:00 AM EST Description Entropy; Temperature Instructions Reading: Sections 11.4-11.5 The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. [MI2e 11.X.3a] 3/3 points Object A and object B are two identical microscopic objects. The table below shows the number of ways to arrange energy in one of these objects, as a function of the amount of energy in the object. E (joules) 4.e-21 6.e-21 8.e-21 1.e-20 1.2e-20 1.4e-20 1.6e-20 # ways 6 20 37 60 90 122 148 When there are 1.2e-20 joules of energy in object A , what is the entropy of this object? S A = 6.21E-23 6.21e-23 J/K When there are 1.6e-20 joules of energy in object B , what is the entropy of this object? S B = 6.90E-23 6.90e-23 J/K Now the two objects are placed in contact with each other. At this moment, before there is time for any energy flow between the objects, what is the entropy of the combined system of objects A and B ? S

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Ch11 HW2 - WebAssign Ch11 HW2(Homework Current Score 16 out...

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