Aim: How to determine the melting point of a substance?

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# Aim: How to determine the melting point of a substance? - PowerPoint PPT Presentation

Aim: How to determine the melting point of a substance?. Challenge : Design an experiment t o determine the melting point of water. Your write up should include the following components : I. TITLE: II. PURPOSE: MATERIALS: Ice, beaker, water, thermometer, stirring rod,

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### 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:

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.