Question $2$

$2\mathrm{.}5$ pts

Choose the correct statements from the options below. There may be several correct statements, but you won't know how many. If there are N correct statements, you will get $2\mathrm{.}5/$N marks for each correct statement you choose, but you will lose $2\mathrm{.}5/$N marks for each incorrect statement you choose. Your score won't go negative.

$q,$

The primary function of a heat pump is to extract heat from a low temperature source

A heat pump can be used as an air conditioning unit with a suitable valve to reverse the hot and cold

reservoirs

When the refrigerant goes through a condenser, a pressure drop may take place

At the outlet of the compressor, the refrigerant should be in the gas phase

The purpose of the expansion valve is to reduce the pressure and so decrease the temperature of the liquid

$q,$

In an ideal heat pump, the compression is an isenthalpic process