A gasoline engine absorbs 2500 J of heat at 250C and expels 2000 ...

[luvbio]

A gasoline engine absorbs 2500 J of heat at 250C and expels 2000 J at a temperature of 50C. What is the magnitude of the change in entropy (in J/K) for the system?
 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

[trog]

Answer to Question 1

c

Answer to Question 2

c

[luvbio]

YES! Correct, THANKS for helping me on my review

[cpetit11]

Thanks for the timely response, appreciate it