The figure below shows a “self-cooling” beverage can.

The can is equipped with an outer jacket containing sodium carbonate (Na₂CO₃), which dissolves in water rapidly and endothermically.

Na₂CO₃(s) → 2 Na⁺ (aq) + CO₃²⁻(aq) ΔH° = 67.7 kJ

The user adds water to the outer jacket, and the heat absorbed in the chemical reaction chills the drink. The can contains 200 g of drink, the jacket contains 55 g Na₂CO₃, and 100 g of water is to be added. If the initial temperatures of the can and the water are 32°C on a summer day, what is the coldest temperature that the drink can reach? The can itself has a heat capacity of 40 J/°C. Assume that the Na₂CO₃ solution and drink both have the same heat capacity as pure water, 4.184 J g⁻¹ °C⁻¹. 
 

Fill with 100 g H;O 200 g beversge 55 g Na CO,