Question

3c. draw a model to explain \how does the heat pack in incubator b keep the turtle eggs warm?\
update the energy transfer model below to show how the energy is transferred between the reaction system, the heat pack, and the incubator system, containing the turtle eggs and sand. include
use the table below the energy transfer model (zoom in view) to explain what is happening at the scale we cannot see. in the zoom in view, use four colors to represent the arrangement of atoms at each stage of the chemical reaction (before, during and after).

Explanation:

Step1: Identify reaction type

The reaction $\text{CaCl}_2 + 2\text{H}_2\text{O}$ is a hydration reaction, which is exothermic (releases heat).

Step2: Map energy transfer

Heat flows from the reaction system (heat pack) to the incubator system (sand + eggs).

Step3: Fill atom arrangement table

• Reactants (Before): Use 4 colors: gray for $\text{Ca}^{2+}$, green for $\text{Cl}^-$, blue for $\text{H}$, red for $\text{O}$. Draw separate $\text{CaCl}_2$ (1 gray, 2 green) and $\text{H}_2\text{O}$ (2 blue, 1 red) molecules.
• During reaction: Show $\text{CaCl}_2$ dissolving, ions separating, and water molecules surrounding ions; mix all 4 colors to show interaction.
• Products (After): Draw $\text{Ca(OH)}_2$ (1 gray, 2 red, 2 blue) and $\text{HCl}$ (1 green, 1 blue) molecules, with remaining water.

Step4: Set typical temp

Exothermic hydration of $\text{CaCl}_2$ raises temp to ~35-38°C (ideal for turtle eggs).

Answer:

Energy Transfer Model Update:

Draw an arrow labeled "heat energy" pointing from the reaction system (heat pack) to the incubator system (sand + eggs). Write $\boldsymbol{37^\circ C}$ in the temperature blank (standard reptile incubation temp).

Chemical Reaction Atom Arrangement (Zoom View):

Reactants ($\text{CaCl}_2 + 2\text{H}_2\text{O}$)	During reaction	Products ($\text{Ca(OH)}_2 + 2\text{HCl}$)

The heat pack uses the exothermic hydration of calcium chloride to release heat, which transfers to the sand and turtle eggs, maintaining a warm, stable incubation temperature.