A refrigerator consumes an average 35W power to operate between...

A refrigerator consumes an average

35W

power to operate between temperature

- 10 ° C

25 ° C

. If there is no loss of energy then how much average heat per second does it transfer? A refrigerator consumes an average 35W power to operate between temperature - 10 ° C to 25 ° C . If there is no loss of

A refrigerator consumes an average 35W power to operate between temperature - 10 ° C to 25 ° C . If there is no loss of

Options

A $350J{s}^{- 1}$
B $298J{s}^{- 1}$
C $263J{s}^{- 1}$
D $35J{s}^{- 1}$

Correct answer

C. $263J{s}^{- 1}$

Step-by-step solution

A refrigerator consumes an average 35W power to operate between temperature - 10 ° C to 25 ° C . If there is no loss of

$W + {Q}_{2} = {Q}_{1}$

$W = {Q}_{1} - {Q}_{2}$

$\dfrac{{Q}_{2}}{W} = \dfrac{{Q}_{2}}{{Q}_{1} - {Q}_{2}}$

$\dfrac{{Q}_{2}}{W} = \dfrac{{T}_{2}}{{T}_{1} - {T}_{2}}$

For one second, $W = 35J$

$\dfrac{{Q}_{2}}{35} = \dfrac{263}{298 - 263}$

${Q}_{2} = 263J$

Hence, average heat per second transferred $= 263J{s}^{- 1}$

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