A chemical engineer needs to calculate the amount of coolant required to cool a reaction vessel to a specific temperature. The coolant reduces the temperature of the vessel by absorbing heat from it. During this process, the coolant evaporates. Which constant should the engineer use to determine how much coolant is required?

–DHvap

DHvap

–DHfus

DHfus

can you list the answers so i can answer

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.