2 clear soda bottles with labels removed 2 Alka-Seltzer tablets (break both in half) Aluminum foil 150W light fixture (heat lamp)
2 thermometers Ruler
250 mL beaker + water stopwatch or timer
Procedure: 1) Examine the list of materials. 2) In a small group breakout room session, discuss how you will use the materials to conduct an experiment that will provide you with evidence to answer the question and prove your hypothesis. Write your notes about the procedure using these questions.

How much water will you add to each bottle?

Where should you hang the thermometer in the control bottle?

How would you make sure gas doesn’t escape?

Why do you keep the amount of energy transferred to each bottle the same?

How far will each bottle be from the light source?

How will you measure the temperature of the gas?

How air particles exert a pressure on the inside of the balloon

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear