Question

If a system is entirely isolated, which of the following conditions apply?

A. Q > 0, W < 0
B. Q=0, W=0
C. Q > 0 , W =0
D. Q = 0, W < 0

Answer 1

by definition, an isolated system can not exchange matter

Answer 2

so would that mean choice B?

Answer 3

I'm pondering...

Answer 4

ok!

Answer 5

I think option A, since, energy change is admitted for an isolated system

Answer 6

ok!! thank you!!:D

Answer 7

using that option, we have:
\[Q = \Delta U + W\] first principle,
so \[\Delta U\] can be held constant