How will you separate a mixture containing kerosene and petrol (difference in their boiling points is more than 25°C), which are miscible with each other​

An engineer designing a new type of engine needs a liquid that can be heated and cooled quickly with as little exchange of energy as possible. which property should the engineer primarily look for in the liquid? a. low thermal conductivity b. low specific heat capacity c. high reactivity d. high internal energy e. high density