3. Is it fair to compare the conductivity of a 10 cm3 solution? Explain your answer.
salt solution with a 100 cm3 copper sulfate
4. In the activity to show thermal conductivity on page 230, the time taken for the paper clips to fall was recorded. How could you make this experiment more accurate and more precise?
Chapter Summary
1. A property of a material is something that can be observed about the material, or the way it interacts with other materials or forms of energy.
2. A physical property is something you can observe without changing the substance.
3. A chemical property describes how a substance reacts with other substances. 4. Physical properties can be described or measured. 5.
of solvent.
Solubility is a measure of the ability of a substance to dissolve in another substance. It is measured in grams dissolved in 100 cm3
6. Thermal conductivity is the ability of a material to allow heat to travel through it. 7.
8. Conductors allow heat or electricity to flow through them. 9.
Insulators do not allow heat or electricity to flow through them.
10. Melting point is the temperature at which a substance changes from a solid state to a liquid state.
11. Boiling point is the temperature at which a substance changes from a liquid state to a gaseous state throughout the liquid.
Electrical conductivity is the ability of a material to allow electricity to travel through it.
Questions and Exercises K C
Key Concepts Rewrite the following sentences in your copybook and fill in the blanks. 1. A _____________ of a material is something that can be observed about the material, or the way it interacts with other _____________ or forms of _____________.
2. Solubility is a measure of the _____________ of a _____________ to _____________ in another substance.
3. Solubility is measured in _____________ of solute per _____________ of solvent. 4. _____________ _____________ is the ability of a material to conduct heat.
