Chapter 9, Problem 9.148CP

Imagine that you dissolve 10.0 g of a mixture of NaNO₃ and KF in 100.0 g of water and find that the temperature rises by 2.22 °C. Using the following data, calculate the mass of each compound in the original mixture. Assume that the specific heat of the solution i5 4.18J/(g•°C).

${\text{NaNO}}_{\text{3}}\text{(s)}\to {\text{NaNO}}_{\text{3}}\text{(aq)}$ $\Delta H$ = +20.4 kJ/mol

$\text{KF(s)}\to \text{KF(aq)}$ $\Delta H$ = -17.7 kJ/mol