/\Stotal
/\Stotal = /\Ssystem + /\Ssurroundings
/\Ssystem
/\Ssystem = sum Sproducts - sum Sreactants
/\Surroundings
/\Ssurroundings = -(/\H/T)
/\G
/\G = /\H - T x /\Ssystem
KJ —> J
X 1000
J —> KJ
Divide 1000
Standard temperature for entropy
298K
T
T = /\H / /\Ssystem