Q6 of 22 Page 17

Answer these. (ASI)

How much energy is released or absorbed when 1gm of steam at 100oc turns to ice at 0oC?

Latent heat of vaporization = 540cal/g


Energy transferred when 1g of boiling water at 100oC cools to water at 0oC is - 100cal


Latent heat change on changing the state from water to ice = 80cal/g


Hence, energy released when 1gm of steam at 100oC turns to ice at 0oC = 540 + 100 + 80 = 720cal.


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