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

Options

  1. A350   J   s - 1
  2. B298   J   s - 1
  3. C263   J   s - 1
  4. D35   J   s - 1

Correct answer

C. 263   J   s - 1

Step-by-step solution

W + Q 2 = Q 1 W = Q 1 - Q 2 Q 2   W = Q 2 Q 1 - Q 2 Q 2 W = T 2 T 1 - T 2 For one second, W = 35   J Q 2 35 = 263 298 - 263 Q 2 = 263   J Hence, average heat per second transferred = 263   J   s - 1

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