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$\cdot$ A window air-conditioner unit absorbs $9.80 \times 10^{4} \mathrm{J}$ of heatper minute from the room being cooled and in the same perioddeposits $1.44 \times 10^{5} \mathrm{J}$ of heat into the outside air. What is thepower consumption of the unit in watts?

767 $\mathrm{W}$

Physics 101 Mechanics

Chapter 16

The Second Law of Thermodynamics

Temperature and Heat

Thermal Properties of Matter

The First Law of Thermodynamics

Simon Fraser University

Hope College

University of Winnipeg

McMaster University

Lectures

03:15

In physics, the second law of thermodynamics states that the total entropy of an isolated system can only increase over time. The total entropy of a system can never decrease, and the entropy of a system approaches a constant value as the temperature approaches zero.

03:25

The First Law of Thermodynamics is an expression of the principle of conservation of energy. The law states that the change in the internal energy of a closed system is equal to the amount of heat energy added to the system, minus the work done by the system on its surroundings. The total energy of a system can be subdivided and classified in various ways.

03:58

20.11. A window air-condit…

03:02

An air conditioner whose c…

03:18

01:11

A window air conditioner h…

03:57

An air conditioner removes…

03:43

A 4 -ton air conditioner r…

01:23

Carnot Air Conditioner A C…

03:09

An electric heater is used…

01:49

How much energy is used by…

03:42

An air conditioner takes a…

02:18

A Carnot air conditioner …

05:51

A common window is to be …

to do this problem. Recall that the power is fine to be the asset value, the work over the time it takes to do that work. So if we can figure out what the S a valley of W is, we can just plug it in this formula to find the power. The asset value of the work can be found from the exchanges between the Han Uncle Reservoir. So it's Q age minus. Q C. And we're given both these numbers in the problem. And so this is just equal to 1.44 times 10 to the fifth. Jules, that's qh an hour Subtracting QC, which is 9.8 times 10 to the fourth Jules. And the result is 4.6 times 10 to the forest. Jules. So now we're going to plug this in here, and the time of this exchange is 60 seconds. And so playing those two numbers in give 767 wants and that's the final answer

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