The Delta E of a system that releases 12.4 J of heat and does 4.2 J of work on the surroundings is J.

A) -16.6

B) -8.2

C) 4.2

D) 12.4

E) 16.6

Which of the following groups is an activator? 

 

A -C-CH3 B C-N(CH3)2 C -SOH D -C-CH3 E