to produce cooling effect
to control the temperature refrigerated space
to convert refrigerant from liquid to vapour state
to control the flow of refrigerant
it has low latent heat
it is non-toxic
it is relatively cheap
it has low working pressure
low
high
optimum
any value
Bigger
Smaller
Equal
Unpredictable
108 degree celsius
654 degree celsius
327 degree celsius
54 degree celsius