A system consists of two very large thermal reservoirs in contact ...

[nramada]

A system consists of two very large thermal reservoirs in contact with each other, one at temperature 300C and the other at temperature 200C.
 
  When 600 J of heat transfers from the 300C reservoir to the 200C reservoir, what is the change in entropy of this system?
  A) 0.221 J/K
  B) 1.00 J/K
  C) 5.00 J/K
  D) -1.00 J/K
  E) -2.31 J/K

Question 2

An ideal Carnot engine operates between reservoirs having temperatures of 125C and -20C. Each cycle the heat expelled by this engine is used to melt 30.0 g of ice at 0.00C.
 
  The heat of fusion of water is 3.34  105 J/kg and the heat of vaporization of water is
  2.25  106 J/kg.
  (a) How much work does this engine do each cycle?
  (b) How much heat per cycle does this engine absorb at the hot reservoir?
  What will be an ideal response?

[manuelcastillo]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: (a) 5740 J (b) 15,800 J