How Much Water Can a Freezer Turn to Ice in One Hour?

[soccer4life]

1. What volume of water at 0^oC can a freezer make into ice cubes in 1.0 hour, if the coefficient of performance of the cooling unit is 7.0 and the power input is 1.0 kilowatt?
2. C.O.P.=Q_L/W
Q=ml_fusion
$\rho$=m/v
3. I found Q_L by using the above formula, which gave me 700J. Next I used Q=ml (l=333000j/kg) to find the mass which is where I got .002 kg (I'm pretty sure that this is where I made my mistake.) Next I know to use the formula for density to divide the mass by the density of water (1 x 10³. Can somebody point out where I made a mistake, or if my thinking is wrong?

 

[Mentz114]

How do you 700J for Q_L ? Shouldn't it be 7J.

 

[SteamKing]

How many J/s are in 1 KW?

 

[soccer4life]

Sorry, I figured out the problem (1000J/s in 1 KW instead of 100...,) but don't know how to close the thread (if possible.) Thanks for the responses though!

 

[SteamKing]

Only Administrators can close threads, so don't worry.