You wish to buy a new kettle and you are considering two different models.Use the specifications of the two kettles provided and the additional data provided to compare the energy efficiency of the two kettles:a) For each kettle:i) calculate the amount of energy used to boil 400g of water (enough for two mugs);ii) calculate the mass of water lost as water vapour in the time taken for thethermostat to react.State any estimates or assumptions you make in your calculations.DataSpecific heat capacity vaporisationWater:4190 J K-1 kg-1Stainless steel:510 J K-1 kg-1Glass:670 J K-1 kg-1Specific latent heat ofWater: 2.26 x 106 J K-1 kg-1 Specifications3000WSage1.75 kgA1.7 litre (1.700 kg water)Stainless steelThermostat reaction time: 9 secondsWith one-touch settings from 80 - 100°C to heat water to the optimaltemperature for green, white, black andoolong teas - there's a 95°C setting forcoffee lovers too.And, if you're not quite ready to pour, itwill keep the water at your selectedtemperature for up to 20 minutes.2400 WBne to lebompotin to alqmee1 litre (1.00 kg water)Stainless steel and glass0.980 kgThermostat reaction time: 15 secondsWith a push-button, slow release lid, thekettle prevents hot splashes of boilingwater, and staggers steam release. Thejug is made from high-quality glasswhich both allows you to see the waterlevel at all times and provides a naturallypure finish.The kettle's element is hidden in thebase, and can boil as little as one cup.

Kettle 1:Specifications: Made of stainless steel. Specific heat capacity of stainless steel:…

Answered: ou wish to buy a new kettle and you are…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

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You wish to buy a new kettle and you are considering two different models.
Use the specifications of the two kettles provided and the additional data provided to compare the energy efficiency of the two kettles:
a) For each kettle:
i) calculate the amount of energy used to boil 400g of water (enough for two mugs);
ii) calculate the mass of water lost as water vapour in the time taken for the
thermostat to react.
State any estimates or assumptions you make in your calculations.

Data
Specific heat capacity vaporisation
Water:4190 J K-1 kg-1
Stainless steel:510 J K-1 kg-1
Glass:670 J K-1 kg-1
Specific latent heat of
Water: 2.26 x 10⁶ J K-1 kg-1

Specifications
3000W
Sage
1.75 kg
A
1.7 litre (1.700 kg water)
Stainless steel
Thermostat reaction time: 9 seconds
With one-touch settings from 80 - 100°
C to heat water to the optimal
temperature for green, white, black and
oolong teas - there's a 95°C setting for
coffee lovers too.
And, if you're not quite ready to pour, it
will keep the water at your selected
temperature for up to 20 minutes.
2400 W
B
ne to lebom
potin to alqmee
1 litre (1.00 kg water)
Stainless steel and glass
0.980 kg
Thermostat reaction time: 15 seconds
With a push-button, slow release lid, the
kettle prevents hot splashes of boiling
water, and staggers steam release. The
jug is made from high-quality glass
which both allows you to see the water
level at all times and provides a naturally
pure finish.
The kettle's element is hidden in the
base, and can boil as little as one cup.

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