Problem 18.69 On a cold winter\'s day heat leaks slowly out of a house at the ra

ID: 1266497 • Letter: P

Question

Problem 18.69

On a cold winter's day heat leaks slowly out of a house at the rate of 25.0kW .

Part A

If the inside temperature is 22?C, and the outside temperature is -13.5?C, find the rate of entropy increase.

Express your answer using two significant figures.

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Problem 18.69

On a cold winter's day heat leaks slowly out of a house at the rate of 25.0kW .

Part A

If the inside temperature is 22?C, and the outside temperature is -13.5?C, find the rate of entropy increase.

Express your answer using two significant figures.

?St = W/K

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the formula for entropy o a system is given by

?S = (Q / T)inside + (Q /T)outside

dividing both sides by t

we get eqn to be modified as

?S / t = [(Q / t) / T]inside +[(Q / t) / T]outside

=[- 25000/(273.15 + 22)] + [25000/(273.15 - 13.5)]

entropy = 11.58 W/K