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Entropy can be viewed a5 measure of molecular disorder molecular randomness. Consider a substance in a solid, liquid or gas phase, which phase has the highest and...

Question

Entropy can be viewed a5 measure of molecular disorder molecular randomness. Consider a substance in a solid, liquid or gas phase, which phase has the highest and lowest value of entropy? Justify your answer.

Entropy can be viewed a5 measure of molecular disorder molecular randomness. Consider a substance in a solid, liquid or gas phase, which phase has the highest and lowest value of entropy? Justify your answer.



Answers

For each pair of substances, choose the one that you expect to have the higher standard molar entropy (S) at 25 C. Explain the reasons for your choices.

Problem Number 52. Let us start with Option E. We have any E and No. Three in equities environment that is higher muehler standard and toppy than in a tree and a and No. Three in solid form. As a quick solution has a greater and Robbie then they're solid form Option B. We have C H three ch three in gashes from this ch three. Ch three has a higher moral standard and drop e then ch four as C H three ch tree has a higher mullah moss and is more complex molecules. So option C, we have Ramin and gashes phone on room mean in liquid form. We know the gashes form has more disorder. Hence the higher entropy option d we have bro mean to again in gashes. And if Noreen the gashes from again has a higher and drop E because it has a greater Moeller Moss auction e, we have peace till five onder be seal three in gaseous form. The P C l five will have a higher entropy because off its greater more llamas on complexity, PCL three has polarity, so it acts as a dye polled. I pull into molecular forces where a specie al five is non polar molecule on dhe London dispersion forces only. So p C L three will have a lesser entropy compared to PC and fire. Lastly, we have ch three See? It's to see it's two ch three then s 02 in gaseous form because off the molecule a greater complexity as photo will have a lesser and drop e, then see, it's three CS two CS juiciest tree.

This question is asking us why we stand that entropy that's not off the sauce stands in a gas state gas status created. Understand that entropy off the substance in a liquid state. The house is because, uh, in the gas dates intra Pete his ire. So we have increase in entropy because we have the gas molecules is randomly moving and more degree of freedom, and they are not interacting us much as we have in the liquid stage. So there's more. This orderliness and gas states more This orderliness Dominus is greater. And, uh, got this two on increasing the entropy with us in the nick with states. For example, if we have water, we have hydrogen bond is the old in the water molecules together, So there's some degree homes off orderliness off some degree off orderliness. Agree off Ottoman s in Jamaica Estates computer. The gashes days, huh? You know, Nick, wish Day get Jordan The reason why do you stand that entropy? 40 gases created on that. But quick because of that this autumn, Innis and gas states is iod under this Ottoman is in a liquid state. And we know that entropy is a measure off the degree. Orderliness off the degree of this orderliness. Our land on the nests are persistent, so assist them in the gas space is more, uh this order done. This is them in a liquid state and subsequently in the entropy for the gas spaces more damp and before her face.

So the question is why the standard entropy for gas is greater than the standard entropy for a liquid of the same material. And so on this road, boys down two and a good way to think of entropy informally as disorder. You're thinking of how disordered is this and is changing this increase disorder. So if you think of going from a liquid to a gas, everything about water between water, paper, think about disorder changes. So a liquid is loosely bound. But her mate, looking of forces, um, his molecules, you know, can maintain size, but they can change what shape they're in. It's very fluid. And when you go to a gas, these particles and no longer really bound together they're just floating around doing whatever into generally speaking, there's more details to it, but the disorders increasing. This is more disordered. If gas particles bouncing around, then these which are leaked weekly bound, so this would be increase in entropy. So for this case, entropy increases represented as s and so how this relates to your standard n trapeze is the same thing because it increases when it changes. This means the entropy for this is greater than entropy for liquid. So s of a gas. This greater man s for a liquid and so has two. If that gas is more disorder than a liquid.

Thermodynamics is the branch of physics that deals with the relationship between heat and other forms of energy. So in particular does describe how thermal energy is converted to and from other forms of energy and how it affects matter. So entropy is very important thermodynamic parameter. So entropy is defined as the thermodynamic quantity that measures the nanoscale dispersion energy in a sample of matter. So we have a process taking place at a constant temperature and pressure. The entropy changes calculated by dividing, assemble he energy that is transferred by the absolute temperature where delta S. Is equal to s final subtract S initial mm. It's equal to Q. Trap the heat divided by t the absolute temperature. So looking at second part here so we have a perfect crystal. The substance has zero entropy. So this is because in a crystal lattice every nano scale particle is located at the correct position. The unit of entropy is jules, Permal park Calvin and the unit of an therapy differs from the unit of entropy by a factor of temperature and the unit of entropy is jules Permal yeah. Yeah. Yeah.


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