Extra Credit

Email needle extra credit picture to dalzellc@trentonschools.com

Gas Law Quiz Tomorrow!

FOR EACH PROBLEM:

·         What gas law is being demonstrated?

·         What is the equation?

·         Show all work and include the final answer with units. 

1.      If 22.5 L of nitrogen at 748 mm Hg are compressed to 96.5 kPa at constant temperature. What is the new volume?

2.      A container of gas is initially at 0.500 atm and 25 ˚C.  What will the pressure be at 125 ˚C?

3.      Calculate the decrease in temperature when 6.00 L at 20.0 °C is compressed to 4.00 L.

1. bcb      2.  ffg     3.  aie 

1/13/15

Quiz Tomorrow:

Phase Diagram Tutorial

Phase Diagram Video


Extra Credit:

•      Make the chart
•      Do the conversions
•      Show all work

Atm (1.00)	Psi (14.7)	mmHg (760)	Mbar (1013)	Kpa (101.3)
50.0
	50.0
		50.0
			50.0
				50.0

1/7/15

Quiz tomorrow:

Extra Credit:  Answer the following questions and show all of your work.

1. Calcium chloride is dissolved in water and forms calcium and chloride ion as well as -82.7kJ of heat.  How much heat is produced from 5.00 grams of calcium chloride in water.

2. Sodium chloride absorbs 3.7 kJ when dissolved.  How much heat is produced from 5.00 grams of sodium chloride. 

Equations:  

3. Are the following endothermic or exothermic?

• Two unknown substances are mixed together and the beaker becomes warm.
• The combustion of methane
• Breaking bonds
• Condensation

Answers:  

1. -3.72 kj

2. .317 kj

3. exo, endo, endo, exo