For a given reaction, S = +69.0 J/molK, and the reaction is ...

[amal]

For a given reaction, S = +69.0 J/molK, and the reaction is spontaneous at temperatures above the crossover temperature, 439 K. The value of H = ________ kJ/mol , assuming that H and S do not vary with temperature.
 
  A) 30.3
  B) -30.3
  C) 1.57  10-4
  D) -1.57  10-4
  E) 6.36  10-3

Question 2

________ has the lowest boiling point of any substance known.
 
  A) Ne
  B) He
  C) Ar
  D) Kr
  E) Rn

[Kaytorgator]

Answer to Question 1

A

Answer to Question 2

B

[amal]

Thanks for the timely response, appreciate it

[Jossy]

Gracias!