How many kilograms of water can be heated from 50°c to 75°c by co steam at 100°c? an be heated from 50°c to 75°c by condensing 1 kg of a. 10.2 kg b. 15 kg c. 21.5 kg d. 25.6 kg

Answer : The mass of water heated will be, (C) 21.5 kg

Explanation : Given,

Initial temperature =

Final temperature =

The value of latent heat of vaporization of steam at = 2260 kJ/kg

Specific heat of water =

Formula used :

or,

where,

Q = latent heat of vaporization of steam

m = mass of water

= specific heat of water

= initial temperature

= final temperature

Now put all the given value in the above formula, we get:

Therefore, the mass of water heated will be, 21.5 kg