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

Water and Ice- To determine the specific heat capacity of water (a) and the specific latent heat of fusion of water (b).

Extracts from this document...


Physics Full Lab Report (1) Title: (B3) Water and Ice- To determine the specific heat capacity of water (a) and the specific latent heat of fusion of water (b). Date: 25 October 2004 Aim: To determine the specific heat capacity of water through electrical method and to determine the specific latent heat of fusion of water using the method of mixture. In the end, the seriousness of heat loss from the heating curve of water by a heater is to be judged. Experiment (a): To determine the specific heat capacity of water Principle: Specific heat capacity of a substance is defined as E= mc?T, where the energy E depends on the mass m of the object and the temperature change?T. For determination, a calorimeter, which consists of an aluminum calorimeter placed inside an insulating jacket made polystyrene, is used. A certain amount of water is added inside the calorimeter and heated with a heating coil connected to a circuit with power supply. ...read more.


Final temperature of water 47.1? Temperature change 5.1? Total time elapsed 2080 s 1. 2. By E=VIt, the total energy evolved during heating of heating coil is: E=(2.6)(2)(2080) E=10,816 J 3. Then by subsidizing the required data into (ii), we have: 10816=(100/1000)c(5.1)+(30.9/1000)(900)(5.1) c=20,930 J kg-1 K-1 Discussion: 1. Compared to the standard value of specific heat capacity of water, 4200 J kg-1 K-1, the percentage error is (20930-4200)/4200x100%�398% 2. Such enormous error cannot be accepted. Some unexplainable mistakes or faultiness must have occurred during procedures. Time, however, does not allow us to re-do the experiment. Thus, the experimental data remains valid. Experiment (b): To determine the specific latent heat of fusion of water Principle: An object absorbs latent heat of fusion while it melts. Specific latent heat of fusion can be found by: E=mlf, where energy E depends on the mass m of the object. In this experiment, some hot water heated ?10? the room temperature in the calorimeter is to be cooled down by adding ice cubes into the until the temperature falls to 10? ...read more.


and (iv), we have E1=(100/1000)(4200)(39.5-15)+(30.9/1000)(900)(39.5-15) E1=10,971.345 J E2=E1 E1=(59/1000)l+(59/1000)(4200)(0-15) l f=248,955 J kg-1 Discussion: 1. As the ice cubes were inserted into the hot water, its temperature falls gradually. 2. The magnitude of temperature fall of the hot water for each ice cube is proportional to the size of the ice cube to be added. 3. The resulting value of specific latent heat of fusion of water, when compared with its standard value of 334,000 J kg-1, is underestimated by: (334000-248955)/334000 x 100%�25.5% Sources of error: 1. Heat is lost to the surroundings by convection, conduction and radiation. 2. Heat absorbed by the polystyrene foam in the jacket is not measured. 3. Thermometer is inaccurate in scale, thus errors may occur in measuring temperature with ordinary thermometer. 4. Personal errors may occur while taking thermometer readings and weighing objects as well. Conclusion: According to the comparison between the standard values and the experimental results, it is obvious that the methods used in their corresponding experiments cannot give accurate results. The main reason is believed to be due to the accounting of serious unmeasured heat loss and errors of system, personal, etc. 1 ...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 Aqueous 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 GCSE Aqueous Chemistry essays

  1. Rate of heat loss

    polystyrene or bubble wrap then the heat loss through the top of the vessel will slow down. Volume of water used When the volume of water is higher, it will stay warmer for longer than if there was a low volume of water.

  2. Investigate how the amount of heat produced by burning a fuel depends on the ...

    * I shall always use the same sized crucible throughout the experiment, and to ensure that this factor is kept constant, I will weigh the crucible each time before I use it. Also, I will use a ruler to measure the diameter of the mouth of the crucible, so as

  1. Specific Heat Capacity

    Using this information, I predict that if density is increased, specific heat capacity will decrease. This is because if an element has a higher atomic mass, it will have a higher density due to the increased mass of each atom or molecule in the space available, and a lower specific

  2. Practical Eighteen-Le Chatelier's Principle

    So, concentration of Fe(CNS)3 decreased. Fe3+(aq) + OH-(aq) Fe(OH)3 (aq) Kc = When sodium hydroxide was added to the first drop, the colour changed to yellow. As Fe3+ had reacted with the hydroxide, more Fe3+ had to be replaced. So, equilibrium would shift to the left forming more Fe3+.

  1. How much Iron (II) in 100 grams of Spinach Oleracea?

    Ammonium Sulphate (aq) that I used. I was forced into using these concentrations, as the concentrations I originally choose to use were extremely difficult to produce solutions for. I did try to make up the stronger solutions but the solid would not dissolve in the required volume of Acid unless

  2. Specific Heat Capacity

    * Energy supplied (voltage ? current ? time) * Energy loss * Temperature of water before being heated The variable that I will change is the mass of water as I think that measuring the Temperature rise in different masses of water for a set period of time would produce the most accurate results.

  1. Establish what types of soil holds the most water and to see if changing ...

    into the stream of water and cutting a channel within the soil for the water to flow through so less is absorbed. These are all random errors that could have not been realised without doing the experiment and are just down to the actual sand present in the soil used in the experiment.

  2. Measuring the Specific Heat Capacity of Water

    We are doing this to increase accuracy and also because if we were to do the experiment in one long period, the temperature rise would be too large and that would increase the amount of heat being lost, so it would ultimately lead to inaccuracy.

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