Sodium acetate is used in many hot packs, which rely on the ability of sodium acetate trihydrate (SAT) to become supercooled, and then spontaneously crystallize via an exothermic process. A solution is made from 50.0 grams of SAT dissolved in 50.0 g of water heated above the melting point of SAT, and is slowly supercooled below room temperature, to 16°C. Assume the specific heat capacity of SAT is 2.19 J/g ·°C and the specific heat capacity of water is 4.184 J/g-°c. The molar enthalpy of fusion is 35.9 kJ/mol for SAT and its molar mass is 136.08 g/mol. Upon crystallization, the temperature increases from 16.0 °C to the melting point of SAT. What is the final temperature of the SAT?

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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.