A steam power plant with an efficiency of 65% of the maximum thermodynamic efficiency operates between 250^oC and 40^oC. What is the change in the entropy of the universe when this plant does 1.0 kJ of work?

Question

Quizplus · Accepted Answer

The maximum thermodynamic efficiency (Carnot efficiency) is calculated using the temperatures in Kelvin. The actual efficiency is 65% of this value. The change in entropy of the universe is calculated using the heat rejected to the cold reservoir, which can be found from the work done and the actual efficiency.

A Steam Power Plant with an Efficiency of 65% of the Maximum