A reversible power cycle whose thermal efficiency is 40% receives 50 kJ by heat transfer from a hot reservoir at 600 K and rejects energy by heat transfer to a cold reservoir at temperature TC.
1. Determine the energy rejected, in kJ, and TC, in K.

Explanation:

For this question, we take into consideration, the following:

We calculate the efficiency of the cycle using the following equation:

where is the temperature of the cold reservoir and is the temperature of the hot reservoir.

To calculate, , we rearrange the above equation.

⇒ 600 ( 1 - 0.4 )

⇒ 600 × 0.6

⇒ 360 K

The efficiency of the cycle is then calculated using the following equation:

Using this equation, we find the amount of heat added to the cold reservoir:

⇒ 50 ( 1 - 0.4)

⇒ 50 × 0.6

⇒ 30 KJ

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explanation:

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only