An engine uses hydrogen undergoing a cycle with the following steps:
i) Isothermal compression from V0 to 0.5V0
ii) Isobaric expansion until the volume returns to the initial volume
iii) Isochoric cooling until the pressure returns to the inital pressure
What is the thermal efficiency of this engine? How does it compare to the efficiency of a Carnot engine operating between the maximum and minimum temperatures of the cycle? Note: for an isothermal expansion from Vi to Vf, W=nRT*ln(Vi/Vf)
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