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10 cards from this deck
Move heat from cold to warm region using external work
Heat naturally flows from warm to cold regions
Removes heat from cold space, transfers to warm space
Transfers heat from outside (cold) to inside (warm)
Yes, COP can be greater than 1
Heat transferred per unit of work done
COPref=QCW=TCTH−TC\text{COP}_{\text{ref}} = \frac{Q_C}{W} = \frac{T_C}{T_H - T_C}COPref=WQC=TH−TCTC
COPhp=QHW=THTH−TC\text{COP}_{\text{hp}} = \frac{Q_H}{W} = \frac{T_H}{T_H - T_C}COPhp=WQH=TH−TCTH
5 J of heat transferred for every 1 J of work done
Transfer >1 J heat per 1 J work done
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