Chapter 9, Problem 51E

In a coffee cup calorimeter, $\text{50}\text{.0 mL}$ of $\text{0}{\text{.100 M AgNO}}_{\text{3}}$ and $\text{50}\text{.0 mL}$ of $\text{0}\text{.100 M HCl}$ are mixed. The following reaction occurs:

${\text{Ag}}^{\text{+}}\left(\text{aq}\right)\text{+}{\text{ Cl}}^{\text{-}}\left(\text{aq}\right)\to \text{ AgCl}\left(\text{s}\right)$

If the two solutions are initially at $\text{22}\text{.60°C}$ , and if the final temperature is $\text{23}\text{.40°C}$ , calculate $\text{ΔH}$ for the reaction in $\text{kJ/mol}$ of $\text{AgCl}$ formed. Assume a mass of $\text{100}\text{.0 g}$ for the combined solution and a specific heat capacity of $\text{4}{\text{.18 J °C}}^{\text{-1}}{\text{ g}}^{\text{-1}}$ .