What are the correct conclusions for the change in entropy in this reaction?

  • Thread starter Thread starter tensirk
  • Start date Start date
  • Tags Tags
    Entropy Reaction
AI Thread Summary
The reaction Ag(l) to Ag(s) indicates a decrease in entropy, as it transitions from a less ordered liquid state to a more ordered solid state, confirming that ΔSsys < 0 is correct. The change in entropy of the universe, ΔSuniv, is generally expected to be greater than zero for spontaneous processes, but the specific sign cannot be determined without additional context. The participant initially expressed uncertainty about ΔSuniv but later realized the question was misclassified as a Physics problem. Ultimately, the focus remains on understanding the relationship between entropy changes in the system and the universe. The discussion highlights the importance of correctly identifying the nature of the reaction in thermodynamic terms.
tensirk
Messages
12
Reaction score
0

Homework Statement



Which of the following conclusions is correct for the change in entropy for this reaction? You must find all of the correct answers.
Ag(l) --> Ag(s) (1atm, 25°C)

1. ΔSsys < 0
2. ΔSuniv > 0
3. The sign of ΔSsys cannot be determined.
4. ΔSsys > 0
5. The sign of ΔSuniv cannot be determined.
7. ΔSuniv < 0

Homework Equations


liquid --> solid = ΔS< 0.

The Attempt at a Solution


The reaction is more orderly because it goes from a liquid to a solid. I am pretty positive that number 1 is, therefore, correct. However, I am unsure of what happens to ΔSuniverse. Any suggestions/hints/information are much appreciated!
***It's been quite a loooong day and I have accidentally entered this as a Physics problem when it's actually Chemistry according to the subject I'm currently working on. Agh...
 
Last edited:
Physics news on Phys.org
Ahh, I've figured it out. Nevermind to this question.
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Entropy of a chemical reaction
Replies
4
Views
2K
Entropy change for two masses of water mixed adiabatically
Replies
1
Views
2K
Calculating Entropy Change for Gas Sample with Helium and Ideal Gas Equation
Replies
1
Views
2K
Entropy Change of Touching Blocks That Reach Equillibrium
Replies
7
Views
5K
Are theses approaches correct? (entropy change of water turning into steam)
Replies
9
Views
4K
Calculating Entropy Change in a Lead-Lake System
Replies
4
Views
3K
Change in entropy of a heat engine
Replies
7
Views
4K
Finding Initial Temperature Entropy and Heat Exchange
Replies
1
Views
2K
Calculating the change in entropy, did I calculate correctly?
Replies
1
Views
2K
Change in entropy of an ideal gas during thermodynamic cycle
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top