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

To compare the mass of ammonium chloride to its temperature change when water is added to it.

Extracts from this document...

Introduction

To compare the mass of ammonium chloride to its temperature change when water is added to it. Aim: To see the temperature change when different amounts of ammonium chloride are added to water. Resources: Before doing the experiment I looked at the book "The Material world" and "GCSE revision guide" and have found information on endothermic reactions. I have highlighted the relevant information in my scientific knowledge. This information will help me make a prediction. Scientific Knowledge: There are two types of reactions, exothermic and endothermic reactions. I will be concentrating on endothermic reactions as the reaction I am to plan is going to be endothermic. An endothermic reaction is when energy is gained, and therefore the temperature of the reaction decreases when the two substances are mixed. So when a solid dissolves, energy is used to break up the giant lattice. The energy used is greater than the energy released by the water molecules that surround the dissolved ions, therefore temperature falls. ...read more.

Middle

Variable: The variable in the experiment will be the mass of the ammonium chloride, which I will be putting random amounts of in to the water so that I obtain good results to make a graph. The volume of the water in which the ammonium chloride will react with will remain constant at all times (50ml). We will be doing the experiment in a classroom so the temperature should not change and will remain constant so that heat doesn't affect the experiment. The same amount of stirs of the solution will be applied to each test, each time so that we help each reaction the same, in helping the break up of the lattice, so that it is fair. The thermometer each time will be left in the water before the ammonium chloride is added for a few minutes to make sure it is at the correct temperature. Fair test: To make this a fair test we will use electronic weighing machines to weight out the ammonium chloride so that the mass is recorded properly and is correct to 2 decimal places. ...read more.

Conclusion

A stirring rod, to stir the solution. Polystyrene cup, to contain the solution and act as an insulator. A glass beaker, to hold the polystyrene cup securely. A thermometer, to measure the temperature before and after the reaction. A spatula, to obtain the ammonium chloride from its container on to the scales. Ammonium chloride. Diagram: Method: 1. Set up apparatus as shown. 2. Now measure out 50ml cubed of distilled water and pour it in the polystyrene cup. 3. Now measure the temperature of the water, and record it. 4. Now weight out different amounts of ammonium chloride starting with little and then more. 5. Now record the mass of the ammonium chloride and tip it in to the polystyrene cup and stir with the stirring rod. 6. You keep stirring for 1 or 2 minutes and watch for the lowest temperature the thermometer gets to and record that result. 7. Do this for each mass 3 times and work out an average temperature change. 8. Do 2-7 for at least 6 different masses and display them in a table like this, why p[aln is good Graph: Analysis: Evaluation: James Allchin ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Classifying Materials 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 GCSE Classifying Materials essays

  1. Investigating the Factors Affecting the Temperature Change Between Zinc and Copper Sulphate

    Questions "What was the temperature change for 1.3g of zinc?" In my first experiments, I recorded the temperature change to be from 22.0�C to 32.4�C, a difference of 10.4�C. For my second experiments, I recorded the copper sulphate solution to be 24.4�C and the zinc sulphate solution 35.2�C - a temperature change of 10.8�C.

  2. Determining the water of crystalisation

    Finally I calculated the mole ratio between salt and water by dividing the number of moles of salt by number of moles of water. DATA COLLECTION Data collected by using weight balance: * mass of crucible with lid - 37.70 (?0.01 g)

  1. Redox reactions and the halogens.

    For example, if the conc. of reactants is increased the equilibrium will move to use the reactants up If you increase the temperature then the equilibrium will change to cool it down. Effect of Conditions * Lower Temp favours exothermic * Higher Temp favours exothermic * Higher pressure favours fewer

  2. Our experiment consisted of two samples of water containing unknown substances, and our objective ...

    it will cause hardly any, if any, damage to the surrounding area like tables; but if we were to drop the Bunsen burner while trying to handle it then it will probably cause a lot of damage to other equipment and more importantly, ourselves.

  1. Affect of concentration on reaction

    Effect of surface-area on reactions If surface area increases, so will the rate of reaction. When surface area is increased (e.g. by cutting object into smaller pieces) more particles is exposed at its many surface, more reactant particles can react at the same time therefore reaction rates increases.

  2. Investigate a factor that effects the change in temperature between iron and copper sulphate.

    The reason this reading was so low was because the iron had reacted with all the copper leaving some iron filings at the bottom of the boiling tube, as there was no more copper for the iron to react with.

  1. An experiment to investigate the factors that determine the amount of energy released when ...

    However, the wool should not be able to burn and give out heat energy, otherwise it would make the experiment unfair. A suitable material for this purpose is ceramic wool. Despite a varying in the mass of the ceramic wool shall not make a difference on the accuracy of the

  2. What "Carried the Trick"? Mass exploitation and the decline of thought in Ray Bradbury's ...

    And the world is full of people running about with lit matches. Every minority, be it Baptist/Unitarian, Irish/Italian/Octagenarian/Zen Buddhist, Zionist/Seventh-day Adventist, Women's Lib/Republican, Mattachine/Four Square Gospel feels it has the will, the right, the duty to douse the kerosene, light the fuse" (176-77).

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