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Standard IX

Chemistry

Latent Heat of Vaporisation

When water is...

Question

When water is boiled to $100^{o} C$ , it converts into steam which on condensation gives back-water. Here, the heat given out is called ___________________ which is equal to the latent heat of vaporization.

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Solution

The heat released is the latent heat of condensation.
Latent heat of condensation is the heat energy released when water vapor condenses to form liquid droplets. The same amount of energy is released in this process which was needed in the evaporation process.

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Similar questions

When water is boiled to 100 $^{\circ}$ C, it converts into steam which on condensation gives back water. Here, the heat given out is called latent heat of condensation which is equal to the latent heat of vapourisation.

Q. 1gm water at

100^{o} C

is heated to convert it into steam at

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and 1 atm. Find the change in internal energy of water. It is given that volume of 1gm water at

100^{o} C

1 c c

, volume of 1gm steam at

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. Latent heat of vaporization

= 540 c a l / g

. (Mechanical equivalent of heat

J = 4.2 J / c a l .

)

Q. Latent heat of vaporisation of water is

540 c a l g^{- 1}

100^{o} C

. Calculate the entropy change when

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water is converted to steam at

100^{o} C

Q. It takes 15 minutes for an electrical kettle to heat a certain quantity of water in grams from

0^{o} C

to boiling point

100^{o} C

. If it takes 81 minutes to boil water into steam, the latent heat of steam is :

Q. If there are no heat losses, the heat released by the condensation of x grams of steam at

100^{o} C

into water at

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converts y grams of ice of

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. Find the ratio of y to x.

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When water is boiled to 100oC, it converts into steam which on condensation gives back-water. Here, the heat given out is called ___________________ which is equal to the latent heat of vaporization.

The heat released is the latent heat of condensation.Latent heat of condensation is the heat energy released when water vapor condenses to form liquid droplets. The same amount of energy is released in this process which was needed in the evaporation process.

When water is boiled to $100^{o} C$ , it converts into steam which on condensation gives back-water. Here, the heat given out is called ___________________ which is equal to the latent heat of vaporization.

The heat released is the latent heat of condensation.
Latent heat of condensation is the heat energy released when water vapor condenses to form liquid droplets. The same amount of energy is released in this process which was needed in the evaporation process.