Table 1 The physicochemical specification of gasoline and ethanol

Chemical formula

C_nH_2n+2 (n = 4–12)

C₂H₅OH

M/(g/mol)

100–105

46.07

Octane number

88–100

108

ρ/(kg/dm³)

0.69–0.79

0.79

Boiling point/°C

27–225

78

Freezing point/°C

−22.2

−96.1

Flash point/°C

−43

13

Autoignition temperature/°C

275

440

Lower heating value^.10³/(kJ/dm³)

30–33

21.1

Latent vaporization heat/(kJ/kg)

289

854

Solubility in water

Insoluble

Soluble