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

Investigation into the temperature rise of water when heated by an electric immersion heater (plan)

Extracts from this document...

Introduction

Investigation into the temperature rise of water when heated by an electric immersion heater Plan: Introduction and aim: In this investigation I am aiming to find out how changing the time an immersion heater is under water for, will affect the temperature of that water due to the amount of energy the water particles will have. An immersion heater transfers electrical energy from the power supply into thermal energy. It will then pass that thermal energy to its surroundings, in this case, the water particles I am planning to heat. The water particles close to the heater will then have more thermal energy than before so will vibrate quicker, colliding more often with other water particles and passing the thermal energy onto them. As time goes by, and the water particles gain more thermal energy from the immersion heater, I will be measuring the temperature of the water at regular intervals to determine actually how time does affect the temperature. Safety: Although I am not working with chemicals that could damage skin or eyes, (which is why it wont be necessary for me to wear goggles or a lab coat,) I will be working with electricity and handling glass which is why I plan to take a number of precautions to ensure that my investigation is safe. - I will not touch any of the electrical components with wet hands to avoid electrocuting myself - I will ensure my bag is under the desk so I don't trip over it - I will take care when handling the glass (i.e. ...read more.

Middle

On the power supply that I am provided with, it is easy to change voltage to a certain number and then keep it constant so this is what I will do. Because of the fluctuation in voltage that I had in my pilot study I have planned to check the voltage every minute and readjust it if it has changed slightly so that it is constantly 10 volts. This will keep the current constant all the way through my investigation too. Also, I will keep the circuit and the wires used in it the same because I want to keep resistance constant. Voltage = current resistance so if I change resistance then voltage will be affected which in turn will effect the energy. As I just explained, current and voltage must be kept constant in order to keep the only factor affecting energy as time, my controlled variable. Another factor that will effect my investigation is volume of water. This is because if there are more water particles at any time it will take longer for the thermal energy to be passed to those particles so overall it will take longer to heat-up. I will therefore keep the volume of water constant at 200ml. I have chosen this volume because this beaker size is deep enough for the immersion heater to be mostly underwater and there is enough space to stir as well. However if I had a larger volume of water, the temperature change each minute would be quite low for the reason I described above. ...read more.

Conclusion

Lastly, when reading the temperature, it will be at eye level to avoid parallax errors, as well as from a thermometer with degree C markings. Pilot study: The main alteration from my pilot study is the voltage. During my pilot study this was 7 volts yet I found that the temperature sometimes didn't even increase by a whole degree each minute. Therefore I increased the voltage to 10. This made the temperature increase each minute easier to determine which is why I am using this voltage for my investigation. When calculating the increase in power when I altered this voltage, I realised I had doubled the power from 17.5 watts to 35 watts, this doubling the amount of energy the particles had each minute. (Because power = current voltage and when voltage was 7V, current was 2.5A so power was 7 2.5 = 17.5Watts, yet when voltage was 10V, current was 3.5A, so power was 10 3.5 = 35Watts.) I therefore learnt that only an increase of 3 volts doubled the power so during my investigation I am planning to be very careful about keeping the voltage the same - even a slight difference could effect my results, making them unreliable. From my pilot study I also learnt that the starting temperature of the water (at 0 minutes, before the heater is lowered into the water) wasn't always the same. This is why I have decided to calculate the temperature rise from this starting temperature when doing my investigation, and I will plot my graph using this. ...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 Green Plants as Organisms 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 Green Plants as Organisms essays

  1. Photosynthesis Investigation

    If you test a leaf for glucose during photosynthesis, you are likely to find very little because it is changed to starch so quickly after it is formed. If you test a leaf for starch during photosynthesis, you find quite a lot.

  2. Yeast Investigation

    The amount of water in the suspension around the outside of the yeast can affect the way respiration takes place. The water in the suspension could differ respiration results because the water is there to keep the temperature of the yeast constant.

  1. Osmosis Investigation

    * Increased air movement, which increase evaporation. * Decreased humidity because water evaporates more easily into dry air. * The state of the stomata, their number, distribution, position and size. Importance of water Water is so important for plants; they can't survive without it because: * It enable transport of

  2. Nuclear Power

    water being released from the reservoir through the dam spins the blades of a turbine. The turbine is connected to the generator that produces electricity. After passing through the turbine, the water reenters the river on the downstream side of the dam.

  1. Hot water in a immersion heater.

    I will boil my water to 70�C, for each material I test. I will also consider the type of material I use, considering the cost of each one. Aim: I have to also consider the mass and the thickness of my material as if it is too thin then my experiment will not be very efficient or work very well.

  2. An Investigation Into The Factors Affecting The Temperature Rise of Water Heated Electronically

    was conducted in the same way, though here the power was the variable, and the change in temperature was named as the dependant variable. I fixed the mass of the water at 20 grams and the time for 4 minutes; I felt this was appropriate as if I used 1

  1. Broad Bean Investigation.

    They may touch and damage a bean. 6. It will be very hard to get 6 different beans which are to be identical to each other so I may have to use different varieties in mass and weight this means that the bean are uneven and this can again affect the overall outcome of the investigation as these beans may grow at different rates.

  2. An Investigation into Species Diversity with distance along a Pingo.

    The soil (in petri dishes) will then be placed in the oven for at least 12 hours 4. The dry soil will then be weighed and the percentage moisture will be calculated iv) pH 1. Soil samples will be taken at each zone 2.

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