When a 7.00-g sample of kcn is dissolved in water in a calorimeter that has a total heat capacity of 2.676 kj·k–1, the temperature decreases by 0.470 k. calculate the molar heat of solution of kcn?

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o