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anonymous
 one year ago
which of the following circumstances leads to a loss of internal energy of a system?
A. 600 J of heat is removed from a system that has 700 J of work done on it
B. 600 J of heat is removed from a system that has 600 J of work done on it
C. 100 J of heat is added to a systsem that has 600 J of work done of it
D. 100 J of heat is added to a system that does 600 J of work
anonymous
 one year ago
which of the following circumstances leads to a loss of internal energy of a system? A. 600 J of heat is removed from a system that has 700 J of work done on it B. 600 J of heat is removed from a system that has 600 J of work done on it C. 100 J of heat is added to a systsem that has 600 J of work done of it D. 100 J of heat is added to a system that does 600 J of work

This Question is Closed

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1here we have to apply this formula, namely the first principle of thermodynamics: \[Q = \Delta U + W\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok! how do we do that?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1we have to pick the case for which \Delta U < 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok! not sure which that would be :(

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1for example, I consider the case A: there we have: Q= 600 and W= 700 so substituting, we get: \[\begin{gathered}  600 = \Delta U  700 \hfill \\ \Delta U = 100Joules \hfill \\ \end{gathered} \] so the answer can not be case A

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ohh i see so should it be choice C? :/

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1case B: Q=600, W= 600, so \Delta U=0 so it is not case B

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1case C;: Q= +100, W= 600 so: \Delta U= 700 so it is not case C

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ohh oops :P so it is choice D?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1yes! since case D: Q= 100, and W= 600, so: \Delta U = 100600=500 which is negative

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ooh yay!! thank you!!
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