# Balancing Equations

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Chem I
Matter Worksheet 2
Properties and Energy
1. Create a table that describes the three common states of matter in terms of
their shape, volume, and compressibility.
2. Identify the following as an extensive or intensive physical property.
a. Melting point b. Mass c. Density d. Length e. Electrical Conductivity 3. Lable the following as endothermic or exothermic processes:
a. Vaporization b. Freezing c. Sublimation d. Deposition e. Combustion -
4. Calculate the amount of heat required to melt 25.7 g of solid methanol at its
melting point. The heat of fusion of methanol is 101 J/g.
5. If three 100 g objects each absorb 5000 J of energy, which one will the highest
temperature? Which will have the lowest temperature? Assume all three start
off at 25⁰C.
a. Alumium (C=0.897 J/g*⁰C)
b. Water (C=4.184 J/g*⁰C)
c. Iron (C=0.449 J/g*⁰C)
6. A piece of concrete absorbs 6525 Joules of energy and the temperture of the
concrete increases from 20.0⁰C to 35.2⁰C. What was the mass of the
concrete? The specfic heat of concrete is 0.84 J/g*⁰C.
7. Calculate the total heat absorbed by a 55.3 g piece of ice initially at -15.0⁰C to
steam at 115.0⁰C. Sketch a curve of temperature vs. energy. The specific
heat of ice is 2.03 J/g*⁰C, the heat of fusi&oacute;n of ice is 333 J/g, the specific heat
of liquid waer is 4.184 J/g⁰C, the heat of vaporization of water is 2260 J/g and
the specific heat of steam is 2.10 J/g*⁰C.
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