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3 years ago

What is the energy required to change 600g of liquid into steam if the specific heat latent is 4000 J/kg

Physics

1 answer:

Rzqust [24]3 years ago

6 0

Answer:

2400 J

Explanation:

Latent heat: This is also called hidden heat, it is the heat that is not detectable by the thermometer.

From the question,

Q = cm.................. Equation 1

Where Q = Energy, c = specific latent heat of the liquid, m = mass of the liquid.

Given: c = 4000 J/kg, m = 600 g =( 600/1000) kg = 0.6 kg

Substitute these values into equation 1

Q = 4000×0.6

Q = 2400 J

Hence the energy required is 2400 J

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Since the speed is constant, this means that the force applied to lift the equipment is equal to the weight of the equipment. So we can write:

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where

m = 1000 kg is the mass

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So,

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Then the work done in lifting the equipment is:

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Substituting,

$W=(9800)(200)=1.96\cdot 10^6 J$

Finally, the power used to lift the equipment is the ratio between the work done and time taken:

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