Chpt 20-2 - Free Energy 20.3 20.4 Last time G = H TS G is...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Free Energy 20.3, 20.4
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Last time ∆G = ∆H - T∆S ∆G is negative means spontaneous ∆G is positive means non-spontaneous ∆S is negative means order ∆S is positive means disorder
Background image of page 2
Example Is this reaction spontaneous? C 3 H 8 ( g ) + 5 O 2 ( g ) 3 CO 2 ( g ) + 4 H 2 O( g ) A. Always Spontaneous B. Depends on Temperature C. Never Spontaneous If you put CO 2 and H 2 O in a room long enough, will you ever get propane?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Example Solve for the ∆G of this reaction at T = 25 Celsius: S( g ) + O 2 ( g ) SO 2 ( g ) ∆H = -575.8 kJ/mol ∆S = -124.9 J/mol-K
Background image of page 4
Another Example Solve for the ∆G of this reaction at T = 25C: H 2 O( l ) H 2 O( s ) ∆H = -6.012 kJ/mol ∆S = -22.0 J/mol-K At what T does ∆G = 0?
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Next point When ∆G = 0, the system is at equilibrium Both the forward and reverse occur When ∆G < 0, spontaneous reaction, the forward reaction dominates When ∆G > 0, non-spontaneous reaction, the reverse reaction dominates
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 15

Chpt 20-2 - Free Energy 20.3 20.4 Last time G = H TS G is...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online