Heating And Cooling Curve

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Procedure Part A: Heating Curve 1. Fill 400-mL beaker three-quarters full of tap water. Heat water above 55oC on a hot plate. Turn off the hot plate, but keep the beaker on the hot plate.

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Heating and Cooling Curve of a Pure Substance Lab #____ Every pure substance has a melting point, a characteristic temperature at which it melts.

1.7: Making a Cooling Curve and a Heating Curve for Candle Wax (Guided Inquiry) Your task is to design an experiment to determine the cooling curve of candle wax. In other words, you will need to construct a graph showing the change in Temperature vs. Time for the substance.

Period:_____ Worksheet: Heating and Cooling Curves Directions : Determine the freezing point/melting point and boiling/condensation points.

Heating and Cooling Curves Graphing Choose a colored pencil for your cooling data and another colored pencil to represent your heating data. Label the abcissa (X-axis) on your graph

Heating and Cooling Curves. Pre-Lab Discussion. Earlier experiments were concerned with the exchange of heat between a substance and its surrounding when the substance undergoes a change in phase.

Energy Calculations for the Plateau Segments of the Heating (or Cooling) Curve ∆H fusion and ∆H vaporization – available on the bottom of the lemon yellow sheet

Chemistry Mrs. Wexler Name _____ Date _____ Heating/Cooling Curves Page 2 B. The following is a cooling curve showing the release of heat at a constant rate of 500.0 joules/minute from a

Heating / Cooling Curve Calculations. EQ: Why is an ideal heating curve not a straight line graph?

Practice Problems (Chapter 7): Heating/Cooling Curves CHEM 30A 1. How much energy (in kJ) is required to completely vaporize 200.0 g of 25.00ºC liquid water? Heat of Vaporization f 2 KEY Heating 200.0 g of liquid water to the boiling point (segment DE): 1

HEATING AND COOLING CURVES. STATES of matter? What would it take for matter to move from one state to another? Energy determines the state! J Deutsch 2003 4 A change in phase is a change in Microsoft PowerPoint – heating curve summary Author:

A cooling curve and a heating curve. When completed, heating and cooling curves of a pure substance using experimental data. (heating lauric acid, hot water, cooling lauric acid, cold water) on the same graph with different colors. Conclusions and Questions

Heating and Cooling Curves. Heating Curve. Using a setup like that shown in figure 3, but without the test tube in the beaker, While the water was being heated, the sample in the test tube was cooling to approximately room temperature.

Practice Problems (Chapter 7): Heating/Cooling Curves CHEM 30A 1. How much energy (in kJ) is required to completely vaporize 200.0 g of 25.00ºC liquid water? Heating 150.0 g of liquid water (segment DE): 3 1 kJ 3 J 15690 J = 15.690 kJ q = m C liq

Heating and Cooling Curves Procedure Part A Fill a 250 ml beaker ¾ full of cold tap water Obtain a corked test tube containing a sample of the substance to be studied.

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