Physics
20 g of ice at 0° C absorbs 10,920 J of heat energy to melt and change to water at 50° C. Calculate the specific latent heat of fusion of ice. Specific heat capacity of water is 4200 J kg-1 K-1.
Related Questions
Explain the terms boiling and boiling point. How is the volume of water affected when it boils at 100°C.
Explain the following —
(a) The surroundings become pleasantly warm when water in a lake starts freezing in cold countries.
(b) The heat supplied to a substance during it's change of state, does not cause any rise in it's temperature.
How much heat energy is released when 500 g of water at 80° C cools down to 0° C and then completely freezes? [specific heat capacity of water = 4.2 J g-1 K-1, specific latent heat of fusion of ice = 336 J g-1].
A molten metal of mass 150 g is kept at it's melting point 800° C. When it is allowed to freeze at the same temperature, it gives out 75,000 J of heat energy.
(a) What is the specific latent heat of the metal?
(b) If the specific heat capacity of metal is 200 J kg-1 K-1, how much additional heat energy will the metal give out in cooling to - 50° C?