0.3-L glass of water at 20C is to be cooled with ice to 5C. Determine how much ice needs to be added to the water, in grams, if the ice is at (a) 0C and (b) –20C. Also (c) determine how much water would be needed if the cooling is to be done with cold water at 0C. The melting temperature and the heat of fusion of ice at atmospheric pressure are 0C and 333.7 kJ/kg, respectively, and the density of water is 1 kg/L.

Explanation:

First we need to state our assumptions:

Thermal properties of ice and water are constant, heat transfer to the glass is negligible, Heat of ice

Mass of water,.

Energy balance for the ice-water system is defined as

a.The mass of ice at is defined as:

b.Mass of ice at is defined as:

c.Mass of cooled water at

b.transmitters send radio waves, and receivers capture radio waves.

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.