Chemistry Summer School
Chapter 2 Quiz 1
2014
1. Describe the differences between a compound and an element. Is water a
compound or an element? Explain your answer.
Compound – combination / multiple types atoms or elements
Element – pure substance / single type of atom or element
2. Ice at 0° Celsius is placed in a beaker and heated, at a uniform rate, on a hot
plate. Heating continues until the boiling point of water is reached, and the water
is allowed to boil for several minutes. Sketch a “heating curve” for this situation,
and describe what is happening with regard to temperature, phase (state), kinetic
energy and potential energy in each section.
Describe:
 1st Temperature will REMAIN CONSTANT and thermal energy will be used to
break the forces between the SOLID H2O “ICE” molecules and MELTS at 0
DEGREES CELSIUS and becomes LIQUID H2O “WATER” molecules.
 2nd Temperature will RISE due to the absorption of heat, the thermal energy
is converted into INCREASED KINETIC ENERGY of each molecule.
 3rd Temp will REMAIN CONSTANT as the energy breaks the molecules of the
WATER apart and BOILS at 100 DEGREES CELSIUS and becomes VAPOR/GAS
H2O “STEAM” OR “WATER VAPOR”.
3. Describe the process (steps) by which you could determine whether a liquid
mixture was a solution, a suspension or a colloid.
SEE WIKI ESSENTIAL QUESTION 2-3???