Question

An ice-cube tray is filled with 69.6 g of water. After the filled tray reaches an equilibrium temperature 20.0 degree C, it Is placed in a freezer set at -8.00 degree C to make ice cubes. Describe the processes that occur as energy is being removed from the water to make ice. Calculate the energy that must be removed from the water to make Ice cubes at -8.00 degree C. KJ

Answer 1

In the beginning water at 20 degree C looses heat energy to the freezer as water is at high temperature and outside is at low temperature, This continues till water reaches zero degree C, during this process the water molecules loose kinetic energy and keep slowing. At zero it starts freezing as the liquid moleclues slow down ,as slow that they start attracting each other and this attraction causes them to arrange themselves into a fixed position.

b) Q = 0.0696kg*4186*(20) + 0.0696*333.55*1000+ 0.0696*2090*8

Q= 30.206 k J