Posted by **Kate** on Wednesday, December 16, 2009 at 10:11pm.

18. (II) At a steam power plant, steam engines work in pairs, the heat output of the first one being the approximate ehat input of the second. Th eoperating temeprautres of the first are 680 degrees C and 430 degrees C, and of the second 415 degrees C and 280 degrees C. If the heat of combuston of coal is 2.8 E8 J/kg, at what rate msut coal be burned if the plant is to put out 900 MW of power. Assume the efficiency of the engines is 65 percent of the ideal (Carnot) efficiency.

Can you tell me if i did this right because I got 640 Kg every second

## Answer this Question

## Related Questions

- AP Physics B (Heat Engines) - 18. (II) At a steam power plant, steam engines ...
- Physics - A steam engine's boiler completely converts 155 kg of water to steam. ...
- Physics - Spent steam from an electric generating plant leaves the turbines at ...
- PHYSICS - At a nuclear power plant water at 8°c from a lake is used in a heat ...
- physics - At a nuclear power plant water at 8°c from a lake is used in a heat ...
- physics - At a nuclear power plant water at 8°c from a lake is used in a heat ...
- PHYSICS help please!!!!!!!!!! - At a nuclear power plant water at 8°c from a ...
- physics - A steam engine’s boiler completely converts 151 kg of water to steam. ...
- Physics - Two steam locomotives are approaching each other, each at 30 mi/hr, ...
- physics - Two steam locomotives are approaching each other, each at 30 mi/hr, ...