Suppose A box represents the universe. It also has a battery and a propellor inside it. The propellor is supposed to increase the temperature of the whole universe including itself and the battery. If this hypothetical universe is initially at 25 degrees C, then we incresed this temp to 27 deg C. This means that we've converted work into heat at the given (initial) temp of 25 deg C. This is allowed by 2nd law. But if we were to consider converting the initial heat of universe into work (upon the propellor) at given (initial) temp of 25 deg C so that the universal temp finally falls to 23 deg C, it would be rendered impossible by 2nd law. Are the above interpretations correct??