Consider a reversible refrigeration machine that works following a Carnot cycle, i.e. a reversible cycle with only two sources, but traveled counterclockwise. Both the temperature of the "cold" source and the temperature of the "hot" source. Let also be and the (signed) heats exchanged with the two sources. Which of the following statements is correct?

(e) Work is and is positive
0%
(d) Work is and is negative
0%
(a) Work is and is positive
0%
(b) is positive and is negative
0%
(c) Work is and is negative
0%

Question

Consider a reversible refrigeration machine that works following a Carnot cycle, i.e. a reversible cycle with only two sources, but traveled counterclockwise. Both the temperature of the "cold" source and the temperature of the "hot" source. Let also be and the (signed) heats exchanged with the two sources. Which of the following statements is correct?

(e) Work is

and is positive

0%

(d) Work is

and is negative

0%

(a) Work is

and is positive

0%

(b)

is positive and

is negative

0%

(c) Work is

and is negative

0%

Answer

(e)  Work is    and is positive

Answer

(d)  Work is    and is negative

Answer

(a)  Work is    and is positive

Answer

(b)    is positive and    is negative

Answer

(c)  Work is    and is negative

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Consider a reversible refrigeration machine that works following a Carnot cycle,...

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