Question

An experimentalist claims that, based on his measurements, a heat engine receives 300 Btu of heat from a source at 900 R, converts 160 Btu of it to work, and rejects the rest as waste heat to a sink at 540 R. Are these measurements reasonable? Why? Draw a sketch showing the direction of work and of heat transfer between the heat engine and the high and low temperature reservoirs. If the heat engine were to operate reversibly between these same two reservoirs, drawing the same value of QH from the high-temperature reservoir, determine the change in entropy for each reservoir, and the change in entropy of the universe.

I only need help with the second part of the question. Determining the the change in entropy for each reservoir, and of the universe. and please draw a sketch if needed.

Answer 1