AH2
AH
The enthalpy diagram to the right represents a set
of thermochemical equations. Which set of
equations could it represent?
A+BCAH = - 500 kJ
C + D →E + 2F AH2 = 100 kJ
F+D →BAH3 = 200 kJ
CA+B →CAH = 800 kJ
C + D + E + 2F AH2 = - 200 kJ
F+D+BAH3 = - 300 kJ
A+DE AH = 500 kJ
DF AH2 = - 300 kJ
E +F
AH
ΔΗΧn
DONE
A + 2D
(Arrow lengths are not to scale.)

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.