Author Question: For a given reaction, S = +69.0 J/molK, and the reaction is spontaneous at temperatures above the ... (Read 67 times)

amal · **on:** Aug 27, 2018

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