Question

How many kg of water at `0^(@)C` can a freezer with a coefficient of performance 5 make into ice cubes at `0^(@)C` with a work input of `3.6MJ?`

Answer 1

`m=? beta=5`
`W=3.6MJ= 3.6xx10^(6)J`
From `beta=(Q_(2))/W, Q_(2)= (beta)W`
`mL= 5xx3.6xx10^(6)J`
`m=(18xx10^(6))/L= (18xx10^(6))/(80xx1000xx4.2)kg`
`m= 54 kg`