M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:	The efficiency of a heat engine is calculated by the formula Efficiency = 1 - (T₁/T₂) where T₁ is the cold reservoir and T₂ is the hot reservoir. Which of the following will maximize efficiency of the system?

In the cold reservoir, increasing pressure while keeping volume constant

In the hot reservoir, decreasing pressure proportionally to a volume increase.

In the cold reservoir, decreasing pressure while keeping volume constant

Decreasing pressure in both the hot and cold reservoirs by the same proportions