Solution Found!
The circles below represent a phase change occurring at
Chapter 5, Problem 17P(choose chapter or problem)
The circles below represent a phase change occurring at constant temperature:
Is the value of each of the following positive \((+)\), negative \((-)\), or zero:
(a) \(q_{\mathrm{sys}}\), (b) \(\Delta E_{\text {sys }}\), (c) \(\Delta E_{\text {univ }}\)?
Equation Transcription:
Text Transcription:
(+)
(-)
q_sys
Delta E_sys
Delta E_univ
Questions & Answers
QUESTION:
The circles below represent a phase change occurring at constant temperature:
Is the value of each of the following positive \((+)\), negative \((-)\), or zero:
(a) \(q_{\mathrm{sys}}\), (b) \(\Delta E_{\text {sys }}\), (c) \(\Delta E_{\text {univ }}\)?
Equation Transcription:
Text Transcription:
(+)
(-)
q_sys
Delta E_sys
Delta E_univ
ANSWER:Solution 17P
The circles below represent a phase change occurring at constant temperature:
Here we have to find out is the value of each of the following positive (+), negative (-), or zero,
(a) qsys; (b) Δ Esys; (c) Δ Euniv
Step 1
(a) q sys :-
The above structure represent the a change of phase from solid to gas phase. It is known that the change of phase from solid to gas involves absorbed of energy, hence qsys is +ve.
Thus qsys is +ve.