The limits are described by Carnot's theorem: https://en.wikipedia.org/wiki/Carnot%27s_theorem_(thermodynamics) https://en.wikipedia.org/wiki/Carnot%27s_theorem

The limits are described by Carnot's theorem: https://en.wikipedia.org/wiki/Carnot%27s_theorem_(thermodynamics) https://en.wikipedia.org/wiki/Carnot%27s_theorem_(thermodyna... Also important to remember when calculating this for yourself that the temperatures must be represented using an absolute scale (i.e. Kelvins or degrees Rankine).