Question

5) Which of the following is a false statement? A) Entropy is a quantitative measure of disorder. B) The total entropy change in one cyele of a Camot engine is zero. C) The entropy of an isolated system must be conserved (it remains constant). D) Entropy can be measured in units of /K 6) A compression at a constant pressure of 200 kPa is performed on $.00 moles of an ideal monatomic gas. The compression reduces the volume of the gas from 0.200 m2 to 0.120 m How much work was done by the gas during this process? A)-16 k B) 16 kJ C)-40 kJ D) 40 kJ 7) A heat engine having the maximum possible efficiency has an efficiency of 35.0% when operating between two heat reservoirs. If the temperature of the cold reservoir? A) 200 K B) 245 K C) 350 K D) 455 K the temperature of the hot reservoir is 700 K, what is E) 600 K 8) A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral metallic sphere that is insulated from ground. It is allowed to touch the sphere for a few seconds and then is separated from the sphere by a small distance. After the rod is separated, the rod A) is repelled by the sphere. B) is attracted to the sphere. C) feels no force due to the sphere. 9) A negatively-charged plastic rod is brought close to (but does not touch) a neutral metal sphere that is connected to ground. After waiting a few seconds, the ground connection is removed (without touching the sphere), and after that the rod is also removed. The sphere is A) negatively charged. B) positively charged. C) neutral.

Answer 1

5.

c) is a false statement

False, entropy of an isolated system will only stay the same or increase. The entropy of isolated system will remain constant only when it reaches its equilibrium i.e. highest entropy.