You take 200. g of a solid at 30.0 °C and let it melt in 400. g of water initially at 85.1 °C. The water's temperature decreases from 85.1 °C to 30.0 °C. What is the heat of fusion of this solid?

I don't know I to do this problem

answerlinnaeus;

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.