Introduction To Thermochemistry Honors

Name ________________________________________ Date ______________ Period _______
HONORS CHEMISTRY – THERMOCHEMISTRY INTRODUCTION WORKSHEET
DEFINE THE FOLLOWING TERMS:
BOILING
BOILING POINT
CALORIE (OR KILOCALORIE)
CONDENSATION
DEPOSITION
ENDOTHERMIC REACTION
ENTHALPY OF FUSION
ENTHALPY OF VAPORIZATION
EVAPORATION
EXOTHERMIC REACTION
FREEZING
HEAT
JOULE
MELTING
MELTING POINT
SPECIFIC HEAT
SUBLIMATION
TEMPERATURE
VAPOR
VAPOR PRESSURE
VAPORIZATION
VOLATILE

Name ________________________________________ Date ______________ Period _______
HONORS CHEMISTRY – THERMOCHEMISTRY INTRODUCTION WORKSHEET
1. Name each of the following changes of state:
a. liquid to gas
b. solid to gas

c. gas to liquid
d. solid to liquid

2. Describe what happens to the molecules in a substance when it melts.
3. Differentiate between liquids and solids in terms of particle spacing, arrangement and motion. 4. Describe how it is possible for a molecule to leave a liquid and enter the gas phase even though the temperature of the liquid is below the boiling point.
5. You will be using several equations in this unit with variables you may not have seen before.
Tell what each of the following variables stands for:
a. Q

c. Cp

e. ΔHf

b. m

d. ΔT

f. ΔHv

6. How are boiling and evaporation alike, how are they different?
7. How are boiling point and condensation related?
8. Describe what happens to the crystal lattice as ice melts.
9. Another word for freezing is __________________.
10. The thing we measure when we want to determine the average kinetic energy of random motion in the particles of a substance is __________________.
11. The __________________ is the energy required to boil one mole of a substance, and its symbol is __________________.

Name ________________________________________ Date ______________ Period _______
HONORS CHEMISTRY – THERMOCHEMISTRY INTRODUCTION WORKSHEET
12. Convert from one unit to the other:
a. 1.69 Joules to calories

f. 6.78 kilocalories to kilojoules

b. 820.1 J to