I have questions about Clausius's law. The specific questions are:
【My Questions】
- (1)What and what is connected in “connected therewith” in 【Quote 1】 below?
- (2) Give me some specific examples of "direct contact" and not "direct contact" in 【Quote 2】 below.
For question 1, Am I right if;
When "Heat transfer from the hot heat source to cold heat source" occurs, "some other change" always occurs at the same time?
For question 2, Am I right if;
Positive heat may flow from "cold heat source A" to the "high-temperature heat source B" only when there is a "region where the temperature cannot be determined" between the low-temperature heat source A and the high-temperature heat source B?
The original text of Clausius's principle is extracted below:
【Quote 1】 (ref.1)
”Heat can never pass from a colder to a warmer body without some other change, connected therewith, occurring at the same time. ”
A book has the following statement as a supplementary explanation of Clausius's principle.
【Quote 2】 (ref. 1)
" But with direct contact, even with man's intervention, heat can never pass from cold to warm."
【Reference】:
(Ref.1)
Block by Block: the Historical and Theoretical Foundations of Thermodynamics