Question

A copper vessel of mass 100g contains 150g of water at 50°C. How much ice is needed to cool it to 5°C? 

Given : 

Sp. heat capacity of copper = 0.4Jg^-10C^-1

Sp. heat capacity of water = 4.2Jg^-10C^-1 

Sp. latent heat of fusion of ice 336Jg^-10C^-1

Answer 1

Heat energy lost by the vessel and water contained in it in