• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Melting and Freezing point of naphthalene

Extracts from this document...


Melting and Freezing point of Naphthalene Research Question 1. What is the specific temperature for the melting point and freezing point of naphthalene? Background During the lab experiment, we are going to place the Naphthalene on the gauze mat which will be kept above the Bunsen burner using a retort stand. A matter can be classified as solid, liquid, or gas and they are known as the three states of matter. We know that particles during the melting process move faster than particles that are in the solid state due to their high kinetic energy. Particles also move slower as the matter changes back into solid due to solid's low amount of kinetic energy. Kinetic energy is the energy that makes the particles move. When the matter is in its solid state, the particles are stuck together in such a way that they do not move; however, when matter is in its liquid state the particles slide over each other. ...read more.


11) Return all equipment to the location it was in the beginning. Observations Qualitative Observations (Table: 1) Melting Process Before During After State of Matter Solid Thick liquid Liquid Shape Somewhat between a triangle and the square Started to take the shape of the test tube Took the shape of the test tube Colour Grey non - transparent colour Started to lose its grey colour and have a more clear colour It is transparent white Qualitative Observations (Table: 2) Freezing Process Before During After State of matter Liquid Thick Liquid Solid Shape Took the shape of the test tube Took the shape of how the liquid was kept in and half was becoming solid Became solid and stayed the same shape as it was in the liquid state Colour Transparent white Transparent whitish grey Pure grey and white colour and no longer transparent Conclusion and Evaluation When the heating curve flattens out, the thick liquid starts turning into a thin liquid, the particles start to move at a faster rate. ...read more.


The particles do though increase its motion as it turns to liquid and decreases because it gets tightly packed with other particles when it transforms back into a solid which decreases its motion. Evaluation The main purpose of this experiment was to find out the melting and freezing point of naphthalene. One of our weaknesses was directly resulted because of the human errors we made. When we were timing, we recorded the time exactly right when it hit the 30s interval. This made a huge error because it took us time to read the temperature shown and to record it. So we suggest that others should first start looking at the thermometer 2s before each 30s interval so that you can get a more precise measurement with less amount of human error. The materials that we used for finding out the melting point and the freezing point of Naphthalene helped benefit in having a more accurate measurement. But the only the thing we could have improved on was the thermometer. We could have used an electronic thermometer to get a more precise and more accurate measurement to find the melting and freezing point of naphthalene. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Chemistry essays

  1. In our research project, we will try to compare the qualitative contents of some ...

    This suggests the absence of chloride ions. The final colour was that of reddish-brown. This suggests the presence of carbohydrates (glucose). The pH was recorded as 3.1. This is an acidic solution. #Coca Cola This is a carbonated beverage sold in more than 200 countries worldwide. It is arguably the most renowned drink in the world.

  2. Research question - How many molecules are there in a liquid drop?

    However, it was made sure as far as it could to avoid these changes. > The same dropper was used for each liquid, in order to try to maintain the volume of the drops.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work