PHYS 201 Midterm: PHYS 201 TAMU Fall 07 Exam 4 Solutions
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No work needs to be shown. (6 pts) 1. ri moles of an ideal gas initially has pressure p1 = 5. 0 x. The gas undergoes a process for which the final pressure is p2 = 2. 0 x. Pa and the final volume is 4. 0 x io m3. In this process, the internal energy of the gas. Pa and volume v1 = (ii) (b) decreases (c) stays the same (6 pts) 2. A circular hole is drilled in a steel plate. 20 c the diameter of the hole is 3. 000 cm. When the temperature of the plate is raised to. 100 c, the diameter of the hole is i5jejn3. oocm (b) 3. 000 cm (c) smaller than 3. 000 cm (6 pts) 3. n moles of an ideal gas expands while the temperature of the gas remains constant. In this process the entropy of the gas (a) remains constant (b) decreases.
