A gasoline engine absorbs 2 500 J of heat at 250C and expels 2 ...

[Brittanyd9008]

A gasoline engine absorbs 2 500 J of heat at 250C and expels 2 000 J at a temperature of 50C. The magnitude of the change in entropy (in J/K) for the system is
 a. 6.2
  b. 4.7
  c. 1.4
  d. 10.9
  e. 3.2

Question 2

A vessel containing 10 kg of water is left out where it evaporates. If the temperature remains constant at 20C, what is the change in entropy (in kcal/K)? (The latent heat of vaporization at 20C is 585 cal/g.)
 a. 30
  b. 10
  c. 20
  d. 40
  e. 290

[fauacakatahaias]

Answer to Question 1

C

Answer to Question 2

C