4Al + 3O2 → 2Al2O3 How many grams of aluminum are required to produce 3.5 moles Al2O3 in the presence of excess O2?

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