Question

which statement describes how a heat pump works? a heat pump decompresses gas to warm air and compresses gas to cool air. a heat pump decompresses gas to warm and cool air. a heat pump compresses gas to warm and cool air. a heat pump compresses gas to warm air and decompresses gas to cool air.

Explanation:

A heat pump uses the properties of compressed and decompressed refrigerant gas: compressing a gas increases its temperature (used to warm air), while decompressing (expanding) a gas lowers its temperature (used to cool air).

Answer:

A heat pump compresses gas to warm air and decompresses gas to cool air.