roh_iso = 0.781 #[g/ml]
roh_mb = 0.815 #[g/ml]

Mm_iso = 60.1 #[g/mol]
Mm_mb = 88.2 #[g/mol]

R = 8.314       #[J/mol*K]
p0 = 76.0       #[cmHg]

T_b_iso = 118 + 273.15  #[K]
T_b_mb = 78.0 + 273.15   #[K]

H_vap_mb = 54000    #[J/mol]
H_vap_iso = 45000   #[J/mol]

s_T = 0.1 #[K]
s_p = 0.05 #[cmHg]
s_V = 0.2 #[ml]
s_brytning = 0.0005