Score = ______/ 20 points
Name ____________________________ Period_____
Virtual Thermodynamics Lab
For this lab you will complete two different virtual lab experiments to calculate the specific heat of
materials and the enthalpies of reactions. The websites we are using come from Iowa State University and are
posted on our class website in the calendar for easy access, or you could type the websites as seen below.
Specific Heat Lab
This lab is similar to our specific heat lab that was performed to identify unknown metals. You can
change the parameters of the mass and temperature of the metal and water to determine the heat that is
transferred between the two. The website for this lab is found here:
http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/thermochem/heat_metal.html
1) Perform the lab with the four known metals making sure to use 100.00 g samples of each metal starting at
o
o
100.00 C. Do not change the values for the water (30.00g and 20.00 C). (1/2 pt each)
Identity of
Metal
Final Temperature
of H2O & Metal
Silver
Gold
Copper
Iron
2) Using your results above, explain how the specific heat of each metal is related to the heat transfer during the
experiment. (2 pts)
3) There are two unknown metals that are provided on this lab that you must identify. Fill in the data charts
below for the two experiments choosing any starting values you wish! (1 pt each table)
Unknown Metal X
Unknown Metal Y
Starting Mass Metal
Starting Temp.
Metal
Starting Mass Metal
Starting Temp.
Metal
Starting Mass H2O
Starting Temp.
H 2O
Final Temp H2O &
Metal
Starting Mass H2O
Starting Temp.
H 2O
Final Temp H2O &
Metal
4) Calculate the heat transferred to the water from the metal for each experiment above (1 pt each – must show
work for full credit!)
Unknown Metal X
Unknown Metal Y
4) Calculate the specific heat for each metal using the heat transferred to the water (q value!) for each
experiment above (1 pt each – must show work for full credit!)
Unknown Metal X
Unknown Metal Y
Enthalpy of Reactions Lab
This lab is similar to our decomposition of hydrogen peroxide lab that was performed to calculate the
enthalpy of a reaction. Make sure you set the values for volume and molarity of both tanks to 1.00 for your
calculations to work! The website for this lab is found here:
http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/thermochem/calorimetry.html
1) Write the equation that shows the neutralization reaction that occurs between aqueous hydrochloric acid and
aqueous sodium hydroxide that produces liquid water and aqueous sodium chloride. (4 pts)
2) Using the correct phases of each chemical above, calculate the enthalpy value for this reaction using the
enthalpy of formation chart handed out in class. (2 pts - Hint, aqueous sodium chloride = -320 kJ/mole)
3) Finally carry out the reaction using the quantities stated in the directions above for the two reactants to record
the data and calculate the heat produced (q) during the experiment. Assume all the aqueous chemicals have the
same density of water. (2 pt data – 2 pts calculation)
Total Mass of
Reactants
Starting Temp. of
Reaction
Ending Temp. of
Reaction