Question

In a refrigerator, heat from inside at 277K is transferred to a room at 300K. How many joules of heat shall be delivered to the room for each joule of electrical energy consumed ideally?

Answer 1

Heat shall be delivered to the room for each joule of electrical energy consumed ideally = 12.04 Joule

Given:

In a refrigerator, heat from inside at 277K is transferred to a room at 300K.

Energy consumption = 1 joule

To find:

How many joules of heat shall be delivered to the room.

Formula used:

Cop of refrigerator = $\frac{T_{min}}{T_{max} - T_{min}}$

Cop of refrigerator = $\frac{Cooling \ effect }{ Work\ supplied}$

Explanation:

$T_{max}$ = 300k

$T_{min}$ = 277k

Cop of refrigerator = $\frac{277}{300-277}$ = 12.04

Work supplied = 1 joule

Cop of refrigerator = $\frac{Cooling \ effect }{ Work\ supplied}$

                    12.04 = $\frac{Cooling \ effect }{ 1}$

Cooling effect = 12.04 joule

Heat shall be delivered to the room for each joule of electrical energy consumed ideally = 12.04 Joule

To learn more...

1)What is the cop for working refrigerator between 30 degree Celsius and 0 degree Celsius​.

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