On a cold winter day, the outside temperature is $- 20 ^ { \circ } \mathrm { C }$ and the inside temperature is maintained at $20 ^ { \circ } \mathrm { C }$. There is a net heat flow to the outside through the walls, roof, etc., of $25 \mathrm {~kW}$. What is the rate of increase of the entropy of the universe as a result of this heat flow?
A) $99 \mathrm {~W} / \mathrm { K }$
B) $13 \mathrm {~W} / \mathrm { K }$
C) $25 \mathrm {~W} / \mathrm { K }$
D) $0 \mathrm {~W} / \mathrm { K }$
E) $85 \mathrm {~W} / \mathrm { K }$

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The Answer of On a cold winter day, the outside temperature is $- 20 ^ { \circ } \mathrm { C }$ and the inside temperature is maintained at $20 ^ { \circ } \mathrm { C }$. There is a net heat flow to the outside through the walls, roof, etc., of $25 \mathrm {~kW}$. What is the rate of increase of the entropy of the universe as a result of this heat flow?
A) $99 \mathrm {~W} / \mathrm { K }$
B) $13 \mathrm {~W} / \mathrm { K }$
C) $25 \mathrm {~W} / \mathrm { K }$
D) $0 \mathrm {~W} / \mathrm { K }$
E) $85 \mathrm {~W} / \mathrm { K }$

On a Cold Winter Day, the Outside Temperature Is −20∘C- 20 ^ { \circ } \mathrm { C }−20∘C

On a Cold Winter Day, the Outside Temperature Is $- 20 ^ { \circ } \mathrm { C }$