Aim: How to determine the melting point of a substance? Challenge: Design an experiment to determine the melting point of water. Your write up should include.

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Presentation transcript:

Aim: How to determine the melting point of a substance? Challenge: Design an experiment to determine the melting point of water. Your write up should include the following components : I. TITLE: II. PURPOSE: III.MATERIALS: Ice, beaker, water, thermometer, stirring rod, clock/stopwatch. IV. PROCEDURE: V. DATA: VI. CALCULATIONS/GRAPH: VII.CONCLUSION: Be sure to include a discussion of sources of error.

Aim: How to determine the melting point of a substance? What is the freezing point of water? How would the mass of the sample affect the melting point? Explain. Determine the boiling point of water. Describe the states of the elements at STP. Use a simple particle model to differentiate among properties of solids, liquids, and gases.

Aim: How to determine the melting point of a substance? condensation deposition freezing fusion gaseous phase heat heat of fusion heat of vaporization kinetic molecular theory sublimation temperature vaporization solidification melt solid phase liquid phase

Aim: How to determine the melting point of a substance? The structure and arrangement of particles and their interactions determine the physical state of a substance at a given temperature and pressure. The three phases of matter (solids, liquids, and gases) have different properties.

Aim: How to determine the melting point of a substance? Temperature is a measurement of the average kinetic energy of the particles in a sample of material. Temperature is not a form of energy. Matter is made up of particles whose properties determine the observable characteristics of matter and its reactivity.

Aim: How to determine the melting point of a substance? The concepts of kinetic and potential energy can be used to explain physical processes that include: fusion (melting), solidification (freezing), vaporization (boiling, evaporation), condensation, sublimation, and deposition.