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# on28 - Solution for On-Line Homework 28 Thermodynamics and...

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Solution for On-Line Homework 28 Thermodynamics, and bring hw 28 and Practice Test 7 for test 4 to class Solution to On-Line Homework Problem 28.1(Multiple choice-First law) Problem: In chapter 10, we learned about the work- energy theorem we represented with work-energy diagrams. Which law of thermodynamics is basically the same thing? Select One of the Following: (a) Zeroth Law - If one object is in thermal equilib- rium with a second object, and the second object is in thermal equilibrium with a third, then the first and third objects are in thermal equilibrium. (b-Answer) First Law: Energy is not lost in pro- cesses that involve changing the temperature or phase of an object, thermal energy is associated with temperature and phase. (c) Second Law - Total entropy cannot decrease, but it can increase; OR heat flows spontaneouslty from hot to cold; OR Heat engines are always less than 100% efficient. (d) Third Law - Entropy approaches a constant as temperature approaches absolute zero.

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