The reaction Br2(g) → 2Br(g) is spontaneous only at temperatures in excess of 1600°C. We can conclude that: a. ΔH is + and ΔS is + for the reaction.
b. ΔH is – and ΔS is + for the reaction.
c. ΔG is + for all temperatures.
d. ΔH is – and ΔS is – for the reaction.
e. ΔH is + and ΔS is – for the reaction.

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°