• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2

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

Extracts from this document...

Introduction

Investigation into the temperature rise of water when heated by an electric immersion heater Evaluation: I believe my investigation went well for a variety of reasons. Mainly, I feel that I have achieved reliable and accurate results and that my procedure was suitable. The method was accurate because I used accurate apparatus such as a digital stop clock that was accurate to every 100th of a second instead of a conventional clock, which is only accurate to the nearest second. I also used a voltmeter that was accurate to every 100th of a volt, making it easier for me to keep adjusting the voltage to exactly 10 (if for example the voltmeter was only accurate to the nearest volt, the voltage could have been 10.49 without me knowing, and this would have increased by a substantial amount the thermal energy of the water particles). To measure out the water I used a measuring cylinder that was accurate to every ml, which meant the quantity of water I used would've been accurate each time. ...read more.

Middle

Although this would not have altered my results drastically, if one minute I stirred slightly faster than another, this could've increased the amount of energy that the water particles had, so the average temperature of the water particles might have been slightly higher. Therefore, to improve my procedure if I carried it out again, the main change I would make would be to use a mechanical stirring machine that could stir at the same speed consistently throughout the investigation, making my results more reliable. Also, by looking at the table, you can see that the starting temperature was slightly higher on the second and third repeats than on the first. Although this didn't affect the actual graph because I used temperature rise on my y-axis, it could have been like this because maybe the actual beaker had not cooled from the time before (even though I tried to rinse the apparatus so it had cooled fully, I had a time restriction throughout the investigation so cooling the apparatus was a rush). ...read more.

Conclusion

the same. I would also keep the time variable constant at seven minutes (I feel this is suitable because it should be long enough to see a substantial change in temperature even at low voltages). To prevent convection currents I would use a mechanical stirring machine that would stir at thirty second intervals at a consistent speed (more reliable than stirring by hand) as well as the same apparatus as with the investigation I have just done (electric immersion heater, beaker, clamp stand, digital voltmeter, digital stop-clock, ammeter, power supply, heat resistant mat, thermometer with degree C markings, five wires, boss and 100ml measuring cylinder). I predict that if I carried out this investigation, I would obtain the same 'S' shaped curve because at first the electric heater itself would be heating up; then there would be a linear relationship (as the voltage increased, the power would increase so the energy would increase i.e. the water particles would be warmer); then lastly, the graph will begin to curve if the temperatures are high enough due to methods of heat loss. ...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

# Related GCSE Green Plants as Organisms essays

1. ## An investigation into the abundance of fresh water black fly larvae, Simuliidae, between pools ...

4 star(s)

1 Temperature probe (grading of 0.1�C)- This is to measure the temperature of the stream, it should be a probe rather than a thermometer so that the temperature can be read at the bottom and middle of the stream, this is where the measurements should be taken each time

2. ## Photosynthesis Investigation

- Get some plants - Cover the whole plant with black bag so no light can go pass - Place the plant inside the cupboard leaving no light to go in - Leave the plant inside the cupboard for about 2 - 3 days (48hrs - 72hrs)

1. ## Broad Bean Investigation.

40 50 25� 0 0 12 23 height of root (mm) 45 61 0 0 15 21 Day 9 - Saturday No school No school ?? No school No school No school No school Day 10 - Sunday No school No school No school No school No school No school

2. ## Physics coursework : temperature change of water heated with an immersion heater

measure the amount of water), stop clock (to time how long the heater has been heated for), glass rod with a coil wrapped around it which will be used as the heater. I predict that the amount of time the heater is heated for will be proportional to the change in temperature.

1. ## Hot water in a immersion heater.

0 70 1 68 2 64 3 62 4 61 5 60 6 59 7 59 8 58 9 57 10 57 Velvet Cloth: Time(Min) Temperature(�C) 0 70 1 68 2 66 3 65 4 65 5 64 6 64 7 63 8 62 9 62 10 61 Foil with bubble wrap: Time(Min)

2. ## Investigation into the temperature rise of water when heated by an electric immersion heater ...

- ammeter - digital voltmeter (accuracy to 100th of a volt) - power supply - 5 wires - water - boss - heat resistant mat - 100ml measuring cylinder (ml markings) Diagrams: Diagram showing all other apparatus before the heater is lowered into the water.

1. ## An Investigation into Water Loss from Plants.

* There should now be 4 test tube racks each containing 5 test tubes. * Using a syringe measure out 10cm� distilled water and add it to the first test tube. Repeat this for all 20 test tubes. * Add 10 drops vegetable oil to the first test tube.

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

If the sky suddenly becomes very overcast light readings will not be taken because the average will be affected and a representative value will not be obtained. * Do not place the soil samples in the oven until they are all weighed to ensure that each sample has the same amount of time to dry.

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