When a solid such as ice begins to melt, heat energy is added. what is the function of this added heat energy?
a) to increase potential energy
b) to separate hydrogen atoms from oxygen atoms
c) to break the bonds between the individual water molecules
d) to add energy to the hydrogen bonds among water molecules

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