Why is decane insoluble in water unfavourable entropy change?
Answers
Answer:
N-DECANE is a colorless liquid. Flash point 115°F. Less dense than water and insoluble in water. Vapors heavier than air. In high concentrations its vapors may be narcotic. Used as a solvent and to make other chemicals. Decane is a straight-chain alkane with 10 carbon atoms N-Decane is found in common oregano. Decane is an alkane hydrocarbon with the chemical formula CH3(CH2)8CH3. 75 isomers of decane exist, all of which are flammable liquids.
Explanation:
H2(g) + 1/2O2(g) ---------> H2O (l)
enthalpy change for the formation of water = -286 KJ/mol
energy released by the formation of water , is absorbed by surroundings . i mean Qs = + 286 KJ/mol
where Qs is heat of surroundings
now,
ΔS = Qs/T
= 286 KJ/mol/298K [ actually heat of formation finding at room temperature e.g., T = 298K ]
= 0.9597 KJ/mol/K