A freezer has a coefficient of performance of 6.30. It is advertised as using electricity at a rate of 457kWh/yr.
a)On average how much energy does it use in a single day?
b) What maximum mass of water at 20.0 degree celsius could the freezer freeze in a single day.
NOTE: One kilowatt hour is an amount of energy equal to running a 1-kW appliance for one hour
COP = Q / W
The Attempt at a Solution
I tried to use comparison like so;
if 457kWh is the rate for 365 days
then xkWh is the rate for 1 day
This gives me 1.25 J which is very wrong.
Please can i get clues on how to start or what to do on the "A" part of the question. It's really twisting my head..thanks a lot for your help..