Physics-
General
Easy

Question

A closed container is fully insulated from outside. One half of it is filled with an ideal gas X separated by a plate P from the other half Y which contains a vacuum as shown in figure. When P is removed, X moves into Y. Which of the following statements is correct?

  1. No work is done by X    
  2. X decreases in temperature    
  3. X increases in internal energy    
  4. X doubles in pressure    

The correct answer is: No work is done by X

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