In contrast you can definitely increase the

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Unformatted text preview: “spontaneous” or process is one that is not accompanied by any change in the rest of the world. For example, heat flow from a hotter object to a colder one can occur even if nothing happens outside these two objects. In contrast, you can definitely increase the temperature of the hotter object and simultaneously decrease the temperature of the colder one, but this requires outside interference. Consequence 2. It is impossible to take heat q from a reservoir, convert it all into work, and return into the original state (no cyclic heat engine with the efficiency equal to 1). Otherwise we could extract heat from a colder object, con...
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