A heater uses water from a geyser with temperature 90◦C and the atmosphere with the temperature...
A heater uses water from a geyser with temperature 90◦C and the atmosphere with the temperature 10◦C as reservoirs. Which is the machine's maximum efficiency?
A Carnot machine operates between reservoirs with temperatures 400
K and 300 K. At the lower temperature, the heating volume 330 is
transferred J. What work does the machine do?
Homework Answers
Efficiency %=( 1- T2/T1)× 100 = (1- 283/ 363)×100
= (1- 283/363)×100= 22%
T2/T1= 300/400= Q2/Q1= 330/Q1
Q1= 440J
Q1- Q2 = 440 - 330 = 100J
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