Problem 1 (closed and open systems). Consider a perfectly insulted piston-cylind

Question

Problem 1 (closed and open systems). Consider a perfectly insulted piston-cylinder assembly that contains a gas. Assume that the seal between the piston and wall of the cylinder is tight. Take the gas to be our system Statement (i): This system is a closed system Statement (ii): This system is an isolated systenm. (a) Statement (i) is true; Statement (ii) s true (b) Statement (i) is true; Statement (ii) is false. (c) Statement (i) is false; Statement (ii) is true. (d) Statenis false; Statemen) is false Problem 2. Only one of the following statements is true. Circle the true statement. (a) A closed system is necessarily an isolated system (b) An isolated system is necessarily a closed system (c) The concepts of closed and isolated in regards to a system are independent concepts (d) A system cannot be both closed and isolated Problem 3. Which of the following is not an intensive property? (a) density (c) specific internal energy (e) None of these (b) volume (d) temperature Problem 4. Identify the SI unit of pressure. (b) kelvin (K) (d) newton (N) (a) pascal (Pa) (c) joule (3) e) None of these

Explanation / Answer

Problem 1 : Since the system is insulated, an there is no escape for the gas , the system is closed and Isolated
So  (a) Statement (i) is true and (ii) is also true.
Problem 2 : Closed system can exchange energy but not matter, but Isolated system cannot excahnge both matter and energy.
So  (b) An isolated system is necessarily a closed system.
Problem 3 : Intensive properties are independent of size of body.
So (b) Volume is not an intensive property.
Problem 4 : The SI unit of pressure is (a) Pascal (pa)

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