Final answer:
The question asks to calculate the heat produced in a precipitation reaction between NaCl and AgNO3, and the amount of heat can be found using the specific heat capacity of water and the temperature change of the solution.
Step-by-step explanation:
The student's question involves determining how much heat is produced by a precipitation reaction when mixing solutions of NaCl and AgNO3. We can calculate this by using the heat capacity of water and assuming the solution's specific heat capacity is similar to that of pure water. When the temperature rises from 21.9 °C to 23.5 °C, we can assume that the only significant heat absorbing substance is the water, which has a specific heat capacity of 4.186 J/g°C.
To find the heat (q) released, we use the formula q = mcΔT, where m is the mass of water, c is the specific heat capacity, and ΔT is the change in temperature. Assuming the density of water is 1 g/mL, we have 200 mL of solution, which corresponds to a mass of 200 g. Plugging this into the equation along with the specific heat of water and the temperature change yields the amount of heat produced during the reaction.