Question: 1 - 2 ) Suppose that a heat engine uses 1 0 0 J of heat energy and operates with 4 0 % of its

1 - 2)

Suppose that a heat engine uses

100

J of heat energy and operates with

40 %

of its thermal efficiency. The work generated from the heat engine

(

you can calculate it easily!

)

is then used as an input work for heat pump to give heat to a room. Please suggest the minimum COP of heat pump that makes it worth. Otherwise, we may just use the original heat energy to heat the room.

1 - 2 ) Suppose that a heat engine uses 1 0 0 J

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