I really need someone whose majored in chemistry.5 page worksheet. Document Preview: Heat Relationships in Physical and Chemical Processes Activity B.5 Lab Report Date: Section #: Instructor: Name: Collective Analysis The energy change, ?Hdissolution, that occurs while dissolving an ionic compound in water can be exothermic or endothermic. Qualitatively illustrate the expected relationship between mass of compound and temperature change of solution in a Styrofoam cup calorimeter filled with water. Use different lines (solid, dashed) to represent the different ?Hdissolution (exothermic or endothermic) Mass of compound (g)Temperature change (C) How would the graph above change if the volume of water in the calorimeter was increased? Explain. 1 In a simplified two-step process, dissolving an ionic solid consists first of breaking the ionic bonds that hold the solid together (lattice energy, ?Hlattice) followed by hydration of the resultant ions by water molecules (hydration energy, ?Hhydration), where the dissolution energy, ?Hdissolution = ?Hlattice + ?Hhydration. Use the data in the group file to describe the periodic relationship between the heat of dissolution (i.e., the energy change upon dissolving, ?Hdissolution) for M-Cl compounds (M=Li, Na, K). Consider the two following models that can be used to explain the periodic trend in ?Hdissolution. MODEL #1: The periodic trend in ?Hdissolution is determined by ?Hlattice. MODEL #2: The periodic trend in ?Hdissolution is determined ?Hhydration. Which model predicts the correct trend in ?Hdissolution for M-Cl compounds (M=Li, Na, K)? Explain. [Hint: the strength of an ionic bond is proportional to the force of attraction between the ions, F = q1q2/r2 where q1 and q2 are the charges on each ion, and r is the distance between the ions] 2 Use data from the group file to plot the mass of magnesium and temperature change for heat of reaction experiment using magnesium and hydrochloric acid. Use the x-axis for the mass of sample (m), and the y-axis for the temperature change (?T). Use different markers to Attachments: b-1.5_f09__la.pdf