28.How much heat energy is released when 5.0 g of water at 20 degree celsius changes into ice at 20 degree celsius? Take specific heat capacity of water= 4.2 J per g per K, specific latent heat of fusion of ice=336 J per g.

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Q. How much heat energy is released when

5.0 g

water at

42^{\circ} C

changes into ice at

0^{\circ} C

? Take specific heat capacity of water =

4.2 J g^{- 1}

, specific latent heat of fusion of ice =

336 J g^{- 1}

Q 8)

250 g of water at 30 degree celsius is contained in a copper vessel of mass 50g.Calculate the mass of ice required to bring down the temperature of the vessel and its contents to 5 degeree celsius.Specific latent heat of fusion of ice 336*1000 J per kg.

Specific heat capacity of copper =400 J per kg per K Specific heat Capacity of water =4200J per kg per K.

A piece of ice of mass 40g is added to 200g of water at 50 degree Celsius. Calculate the final temperature of water when all the ice has melted. Specific heat capacity of water =4200 J per kg per K and specific latent heat of fusion of ice=336*1000 J per kg.

Calculate the amount of heat released when 5.0 g of water at 20 °C is changed into ice at 0 °C.

Specific heat capacity of water = 4.2J g^-1 °C^-1, Specific latent heat of fusion of ice = 336 J g^-1.

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