H for an endothermic process is ________ while H for an ...

[AEWBW]

H for an endothermic process is ________ while H for an exothermic process is ________.
 
  A) zero, positive
  B) zero, negative
  C) positive, zero
  D) negative, positive
  E) positive, negative

Question 2

Fuel cells are more efficient in converting chemical energy to electricity than internal combustion engines are.
 
  Indicate whether the statement is true or false

[shaquita]

Answer to Question 1

E

Answer to Question 2

TRUE

[AEWBW]

Thanks for the timely response, appreciate it

[Animal_Goddess]

Wow, this really help