October 2007 - Posts

Questions for Regents Practice in latest packet.

Questions 1-29.

The test will cover everything starting with notes dated 10/9.

Topics:

Heat including definitions and equations.  Know how to identify endothermic and exothermic processes. 

Converting between K and degrees celsius.

Know everything about Heating and Cooling curves including how to identify melting/freezing/fusion and boiling points, potential and kinetic energy differences and phases along each segment of the graphs. 

All topics related to gases including behavior and all gas laws.

Kinetic Molecular Theory.

Vapor Pressure curves.

All topics related to liquids and solids.

 

Come see Astoria Stories, a documentary created in Long Island City H.S.  It will take place on Friday at 3PM, immediately following Open School Afternoon in room 275. 

You may be surprised to learn what other students are going through, or maybe you will end up feeling that you are not alone in the experiences.

Know everything related to Gas Laws!

Questions 108, 110-113, 118 on pages 61-62.

Questions Boyle's Law and Charles' Law handouts.

What lies behind us and what lies ahead of us are tiny matters compared to what lives within us.

Open School Evening:   Thursday, October 25 - 6PM-8:30PM

Open School Afternoon:  Friday, October 26 - 1PM - 3PM

Heat problems handout.

Freezing and Boiling Point Graph (page 13 in packet)

Cooling Curve Worksheet

 
Conclusion:
1.  The Melting Point (fusion) of a substance is the temperature at which a _______ changes to the ______ state.
2.  At the melting point, the substance exists as both a _____ and a ______.
3.  What happens to the temperature of the substance as it is being heated at the melting point?
 4.  How can this be explained? 
 5.  The Boiling Point (vaporization) of a substance is the temperature at which a _______ changes to a ______.
6.  At the boiling point, the substance exists as both a _____ and a ______.
7.  What happens to the temperature of the substance as it is being heated at the boiling point?  
8.  How does the graph look at the melting and boiling points?
9.  What happens to the Kinetic Energy of the molecules at the melting and boiling points and how do you know?
 

Procedure: Add unknown solid to the beaker to approximately the 150mL line, and place the thermometer in the beaker.

Wait 1 minute, take the temperature reading (°C), and record it in the data table along with the phase.

Place the beaker on the hot plate that has been set to an "8".

Record the temperature every minute until you have taken 3 temperature readings after boiling.  Stir gently with the thermometer.

Note:  Do Not remove the thermometer from the beaker when taking readings.

Create a line graph using the data collected.  Connect all your points.  

Know how to calculate calorimetry problems using all three heat formulas.

Complete questions 9-12 on Calorimetry Problems handout.

Questions 3-8 on the Calorimetry Problems handout.

You should have a minimum of 4 labs completed.

Columbus Day.

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