Question

How much energy is transferred when 1gm of boiling water at 100c condenses to water at 100c
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Answer 1

Explanation:

The energy transferred when 1 gm of boiling water at 100C condenses to water at 100C is equal to the latent heat of vapourisation of water which is equal to 2260.

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Answer 2

Answer:

540 cal (2256 J)

Explanation:

Q = m$L_{va}$

(we are using this formula because there is a state change in the substance. Rather if there was a temperature change we could have used:

Q = m c Δt)

where ,

Q = heat energy

m = mass = 1 gm

$L_{va}$ = latent heat of vaporization = 540 cal/gm

now, Q = 1 * 540 cal

           = 540 cal

for Joule

1 Kcal = 4180 J

0.540 kcal ≈ 2256 J

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