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General Transzered Two Numbur ice cubes Chemisury #hEdition or from 8 4 suroundings, 19.0 H into ' 7esinal H H HH TC 3 : H 6,01kJlmol 1 JJl(mol-K) alter 3 Tnss...

Question

General Transzered Two Numbur ice cubes Chemisury #hEdition or from 8 4 suroundings, 19.0 H into ' 7esinal H H HH TC 3 : H 6,01kJlmol 1 JJl(mol-K) alter 3 Tnss ; energy ice melts .iHexi

General Transzered Two Numbur ice cubes Chemisury #hEdition or from 8 4 suroundings, 19.0 H into ' 7esinal H H HH TC 3 : H 6,01kJlmol 1 JJl(mol-K) alter 3 Tnss ; energy ice melts . i Hexi



Answers

Calculate the quantity of heating required to convert the water in four ice cubes $(60.1 \mathrm{~g}$ each $)$ from $\mathrm{H}_{2} \mathrm{O}(\mathrm{s})$ at $0{ }^{\circ} \mathrm{C}$ to $\mathrm{H}_{2} \mathrm{O}(\mathrm{g})$ at $100 .{ }^{\circ} \mathrm{C}$. The enthalpy of fusion of ice is $333 \mathrm{~J} / \mathrm{g}$ and the enthalpy of vaporization of liquid water is $2260 \mathrm{~J} / \mathrm{g}$.

So we know that the energy of sublimation is equal to the energy of the mounting and the energy of vaporization. And so the energy of mounting is equal to the massive four ice cubes, Multiplied by 333 jewels per gram Is equal to 8005 3.2 jewels. The energy of vaporization is, he. Put the maps for ice cubes multiplied by 2260 jewels, divided by one grand. We got 543304 jewels, and so we had these two bodies together here for the energy of sublimation, Which is equal to 6.23 times 10 to the five jewels.

Key role in the chemical processes. And according to the modern view of chemical reactions, bonds between atoms and the reactant need to be broken where the atoms or pieces of the molecule can reassemble into our products by forming new bonds. So here we're determining the quantity of thermal energy that is needed to melt ice from zero degrees to liquid at zero degrees. Well divine that is defined as Q. One. Would you is equal to M. The mass of H 20 Multiplied by delta H. Fusion Which is equal to 18648 jewels. Then we can take a look at cute too. It's equal to the specific heat capacity of water, multiplied by the mass of water, multiplied by the change in temperature of water Which is equal to 1757 2.8 jewels. Where Q overall S. Q. One and Q. Two. We get 36.22 kg jewels. Where delta H. Not. It's equal to the sum of the moles change in entropy of formation of the product. Subtract some of the malls change in entropy of formation of the reactant. What we should get is this is equal to negative 3363367 kg jewels. And so what we need to do when determining the mass in grams Is we have 36 fast father were calculated 36.22 kg jewels, divided by negative 3363367 Drop the negative killer jewels, multiplied by 44 g. Which is what we know. This gives us not 440.47 g. So therefore we can conclude that not 0.47 g of propane is required to melt ice.

Here we are continuing to look at energy and energy transfer into the first thing we're looking to do is determine the grams of air in the house. So the mass in grams is equal to the density multiplied by the volume of the house. So what we have is 1.22 g per mil. Multiplied by 10 to the six mils per meter cubed. Multiplied by 275 m squared, Multiplied by 2.5 m. What we get is a 38 0.75 Times 10 to the six g. So that's the all blacks. That would like to plug into the following equation. That is Q. Is equal to the specific heat capacity, multiplied by the mass, multiplied by the change in temperature. So plugging in our values what we get there is 591 2.3 Times 10 to the three units of kilo jewels. So this means that 591, times 10 to the three kg jewels of thermal energy is needed for heating the air. And so in order to calculate the entropy change, this is equal to the sum of the malls, multiplied by the entity change of formation of the products. Subtract the some of the moles multiplied by the entity change of formation of the reactant. And this is equal to negative 861.369 kg jewels. And so then continuing on what we'd like to do is determine the mass of methane. So the massive methane may require is simply Q5912.3 times 10 to the three Here jules divided by adults age not negative. 861 0.369 kg jewels. However, we dropped the negative there Multiplied by the 16 grounds. And so what we're left with, It's 1.1 times 10 to the two kg. So this means that we need 1.1 times 10 to the two kg of methane to heat the air.

We're looking at the freezing water from water to your eyes. So we give him the audacity off order and ice. So one of the observation or we have thing happened this step when there's ah pressure on ice, it's increase. Apply fresh allies increase it would cost dies to mouth. So we have explained why and also for this fume. And it is this normally re officer for so they in general. Okay, so first off, or when Indian kristic stone pressure to rise for you melts. Ah, you know that You see that? Ah, most going on. We can look at the Dan City first. The tennis issue of eyes is assaulted. Actually, you can see that is less and delva liquid less sending only quick. Therefore, you everything about that um the what? The mark You, um, packing us a distance between Or the space between Baltimore Killian eyes. So they have more space when compared to water water. We have last space because their space missions that they occupy you to have the same mass they should be occupying last volume or you re have ah, same master with occupy higher volume for ice. Okay, because for ice eyes are kind of interesting solid because the step of something called a open has ago NOAA structure. We got the water Markarian eyes. They are waging a fraction that it will have a law. Space is a very not if active packing is a lot of space, and it caused eyes have for so we're have a lower nah city. Okay, so when um, when the print pressure increased were stench essentially is you're going to compress. Ah, water more que you? Nice. Okay, So when the mark, what's a more curia? Nice being compressed. So they are going to be, um, collapse collapse. All right, So the distant the space, the area between water marketing isa screen compress. So they're going to get closer and closer together. So they're 10 intensity of which increased intensity wing increase. So when we are going to look at that, the collapse in structure and as the space regime molecules going to decrease, this is going to cost eyes to turn to be water because eyes the next phase, there's going to be water. Okay, we go through half, we're going to have something. We have more space being compared to last space from eyes to water. Okay, so that's why when we a practical, fresher higher we're going to we do the space between water molecule your eyes Why we reduce that space If we will force the water to ah get coast of each other to go back to the liquid face. Okay. However, this phenomenon doesn't know officer for come in sold it. The reason is that for coming salted so that if if we just sold it the quick gas We're looking at depicting space. So all the distance between market So we took it pregnant, pregnant are packing space We should have to gas should be higher that ah liquid then the hydra solid So build gas does love Ah, space Russian markets or so diffuse liquids much closer But it's not that close. So they market that's too can't throw ah for each other. So you as a liquid But you insulted everything. We will pack closely as a solid Um you cannot be moved easily. He cannot be really easily So when we apply pressure to ah Sol it that everyone plaque closed over the appropriate clothes. We just make the sort of much more content. And then we're still remain as a solid because they thought the Markkula Parco did pat. Or a week we re closed in solid in concerts to water. What account? Interesting. Because you have a solid form with fellow space. When compress it, go back to liquid form there his last space.


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