Question

Some water and 270 g of ice is given
same amount of heat. What amount of
water can be vapoured by the time of ice
melts fully?
1)27g 2)40g 3)108g 4)none of these​

Answer 1

You can vaporize 39.9 g of water.

Explanation:

Heat to melt ice = Heat to vaporize water

q1=q2

m1ΔfusH=m2ΔvapH

where

m1= the mass of the ice

ΔfusH=the enthalpy of fusion of ice

m2= the mass of the water

ΔvapH= the enthalpy of vaporization of water

《《 see picture》》

there ans is 40 g

Answer 2

Answer

40

explanation

Q of ice = ML ( ° •° here physical state is changing)

Q. =. 270. × 80. (latent heat of fusion =. 80 cal.÷gm)

= 21,600

(here given ice and water gives same amount of water)

Q of water =. ML

21600. =. m×540. (latent heat of water =. 540 cal÷gm)

21600 ÷ 540. =. m

40. =. m

therfore , amount of water vapoured =. 40 gm