2.4. Thermodynamic parameters
Thermodynamic parameters (DH, DS and DG) for the oil extraction
of coconut waste using hexane and petroleum ether were estimated
using following equation (Liauw et al., 2008):
ln K ¼
DG
R
1
T ¼
DH
R
1
T þ
DS
R ð9Þ
K ¼
YT
YU
¼
mL
mS
ð10Þ
where K is equilibrium constant, YT is the yield percent of oil at temperature
T, YU is the percent unextracted oil in coconut waste, mL is
the amount of coconut waste oil in liquid at equilibrium temperature,
mS is the amount of coconut waste oil in solid at T, C equilib-