Isabelle pour 158cm3 of glycerin, at a temperature of -12 oC, into a graduated cylinder initially at 19 oC, filling it to the very top. The cylinder is made of glass with a specific heat of 840 J/kg-K and a coefficient of volume expansion of 1.2 x10−5K-1 ; its mass is 0.110kg. The mass of the glycerin is 0.0873 kg. (a) What will be the final temperature of the glycerin, once thermal equilibrium is reached? (b) How much glycerin will overflow the cylinder before thermal equilibrium is reached?

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Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.