Equilibrium and c is because ice cube is water so it will melt

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Discussion Overview

The discussion revolves around identifying which of several systems are in an equilibrium state, focusing on concepts of chemical and physical equilibrium. The systems include a container with alcohol, dissolved crystals in water, an ice cube in water, and moth balls in a stoppered flask.

Discussion Character

  • Exploratory, Conceptual clarification

Main Points Raised

  • One participant suggests that all systems (a, b, c, d) could reach equilibrium, particularly noting that systems a and d are stoppered, preventing vapor escape.
  • The same participant argues that system b, with dissolved KMnO4, initially disturbs equilibrium but will eventually stabilize.
  • Regarding system c, the participant claims that the ice cube, being water, will melt without affecting equilibrium.
  • Another participant prompts a reconsideration of system c by questioning the temperature of ice compared to average room temperature.

Areas of Agreement / Disagreement

There is no consensus on the status of system c, as one participant challenges the initial interpretation of its equilibrium state, indicating that multiple views remain regarding the conditions affecting equilibrium.

Contextual Notes

The discussion does not clarify the specific temperatures involved or the definitions of equilibrium being used, leaving some assumptions and conditions unresolved.

aarietta
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Hello there,
I am unsure about the following question and would like some help to understand please! :smile:

Consider the following systems:
a) a container that is half filled with alcohol, stoppered and allowed to stand for several days
b) crystals of KMnO4 that are dissolved in water until the water becomes a uniform purple colour and a constant amount of crystal remainds in the container
c) an ice cube in a beaker of water in a normal classroom
d) moth balls that are placed in an empty flash that is then stoppered and alllowed to stand for several days

Which of the above are in an equilibrium state?
i) a and b
ii) a,b,d
iii) b,c
iv) a,b,c,d


At this moment, I am picking IV because A and D are stoppered in the flask so it would eventually reach equilibrium since no vapour is allowed to escape. As for B, when the crystals mix in with water it causes stress to the equilibrium but then it would eventually fix itself back to equilibrium and c is because ice cube is water so it will melt into water, which causes no change to the equilibrium.

Thank you!
 
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You may wish to re consider system c. What is the temperature of ice? What is average room temperature?
 
Ohh... I see!
Thank you
 
aarietta said:
Ohh... I see!
Thank you
No problem :smile:
 

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