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IB Investigating Specific Latent Heat of Vaporization of Water

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Introduction

Investigating Specific Latent Heat of Vaporization of Water

Research Question

Investigating specific latent heat of vaporization of water.

Data

Controlled Variables

Power of the kettle: 1000W

Intervals of the recording mass: 15s

Mass of the water boiled

Table 1: Mass of water evaporated over time

Time

±1s

Mass of Water evaporated

±0.1g

Trial 1

Trial 2

Trial 3

Trial 4

Trial 5

15

4.7

4.8

5.2

5.0

5.4

30

11.5

10.5

10.7

10.6

10.9

45

16.7

16.6

16.6

16.3

16.7

60

22.4

22.1

22.9

23.0

23.4

75

28.4

28.6

28.5

29.1

29.1

90

34.2

34.3

35.0

34.4

35.1

105

40.5

40.3

40.4

41.1

41.2

120

47.0

46.1

46.3

47.6

47.9

Uncertainty in measuring time was ±0.01s according to the stopwatch but while measuring mass you have to first look

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Middle

±0.1g uncertainty.

Table 2: Mass of water evaporate over time with uncertainties

Time

±1s

Mass of Water Evaporated

(±0.1 g)

Average

Uncertainty

Trial 1

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Conclusion

While recording the mass of water, the mass of the water in the electronic balance was not constantly decreasing. Sometimes it increased, sometimes it decreased slowly and sometimes rapidly and because of this there was a high error in collecting data. An electronic balance with high mass capturing should have been used for better results. The electronic balance used did not have a wide base and the kettle used to boil water was overturning it which also can result in high error. An electronic balance with wide base should be used for more accurate results.

Works Cited

"Latent Heat." Wikipedia. Wikimedia Foundation, 10 May 2012. Web. 07 Oct. 2012. <http://en.wikipedia.org/wiki/Latent_heat>.

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