Thermodynamics Quiz

Thermodynamics Cliff Notes

Reaction of Hydrogen Peroxide and Potassium Iodide

Fill a test tube half-full with 3% hydrogen peroxide. Do not discard the solution. Fill a second
test tube half way with 3% hydrogen peroxide. To the second test tube add small scoop of potassium iodide.

Both tubes contain hydrogen peroxide, the one on the left has added KI and the one on the right is untouched.

Alka Seltzer

Take an Alka Seltzer tablet and break it in half. Place 100 mL of ice water in a small beaker.
Place 100 mL of hot water in another small beaker. Add one half of the Alka Seltzer tablet to
each beaker and time how long it takes to dissolve


Cold water on the left, hot water on the right

Reaction of Zinc and HCl

Take a few chips of zinc and place them in two test tubes. To the first test tube add five mL of 0.5
M HCl. To the second test tube add 5 mL of 5 M HCl.


5M HCl on the left, 0.5M HCl on the right (ignore the yellow, just dicolored test tube)

Reaction of Steel and Oxygen

Take a nail and hold it in a flame using a pair of crucible tongs. Take observations. Next, take a
small piece of steel wool and pull it apart until it is somewhat fluffy. Use the crucible tongs to
hold the fluffy steel wool in the Bunsen burner flame.