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If acetone (C3H6O) has a heat of fusion of5.7 kj/mol, how much energy is involved in the freezing of 200 g ofit at its freezing point? Is this energy lost or gained...

Question

If acetone (C3H6O) has a heat of fusion of5.7 kj/mol, how much energy is involved in the freezing of 200 g ofit at its freezing point? Is this energy lost or gained by theacetone?

If acetone (C3H6O) has a heat of fusion of 5.7 kj/mol, how much energy is involved in the freezing of 200 g of it at its freezing point? Is this energy lost or gained by the acetone?



Answers

If $11.6 \mathrm{~g}$ of acetone requires $62 \mathrm{~kJ}$ of energy to vaporize at $25^{\circ} \mathrm{C}$, determine the heat of vaporization at this temperature.

This kosher number 33 is almost similar to question number 31. So we have a formula for change in entropy off a system Delta s equal Q, divided by t were provided with the heat off fusion that is Delta H off acetone is equal to five point 69 Kayla jute or more. We calculate the mast. We calculate the mole off acid don't formula to calculate the mole is must divided by moon llamas. Substituting in these value. The mass is 45 grams, divided by 58.0. It crumbs the number off mole turn out to be 0.775 mole Now, from this, we can calculate the amount off heat lost by the acetone. As follow acetone undergoes freezing. So the change from liquid fees to solid face it loses heat and energy to freeze itself. So los often already that goes Q equals negative and negatives for lost and number off mole Delta H well, we are already provided substituting in those values. 0.7 75 multiplied with 5.69 the value off cue turn out to be 4.41 negative 4.41 kilo, Jules converting it into Jule. We have negative 4400. And then, Jewel, let me put it into a box to calculate the delta s. The temperature should be in Kelvin, not in Celsius degrees. So converting the given time preacher 94.8 into Kelvin just by adding 273 the temperature is 1 78 point to Calvin. Substituting this temperature value onda value off you already calculated into the first given equation Delta s finally Delta s is equal to negative. 44 104 Q and temperature 1 78.2 The Delta Esther No Toby Negative. 24.7 Jewels for Kevin.

So so my dynamics is the branch of physics that deals with the relationship between heat and other forms of energy. So in particular, it does describe how thermal energy is converted to and from other forms and energy and how this affect matter. So we know the heat of vaporization for acetone. That's 29.1 kg joules per mole. And so if we're looking at the process of vaporization under constant pressure and temperature, we have a reversible change. Where delta S. Is equal to delta H. Divided by team is equal to delta H vaporization divided by T the temperature, While the temperature in Kelvin is 3- 9.15 Kelvin. So delta S is equal to 29.1 times 1000 units of jewels, bothered by 3 to 9.15 Our temperature we get 88.41 joules per kelvin.

Everyone. So in this caution they ask the model heat of a traditional passage in C. Three at 60 Is 30.3 cultural Permal at its boiling point. How many commercials have hit will be liberated by condensation of fi a grandma. Pass it on so kill a job heat liberated pillar tool of huge liberated bye condensation of sit down. That is equal to for you gram of C. three. I had six or into one more C. three and 6. Oh Upon 15.1 g C3 and 60 into minus 30.3 kg jal. Be wanted by one mould. Mhm. C. three at 6. or and that is equal to my nurse 2.61 kilo june. Therefore kill a jewel of he liberated by condensation of acetone. Okay. Of I sit down That physical to -2.61. Okay. Hello june. Thanks Lord.

Solution for the Evo problem. We have data. Moss is equal to 13.3 g. Andi Moeller Moss is able to 82.9 ground Permal and and Tokyo Futian is able to 4.60 Kill Joel Pirmin. So here the amount of energy released. Uh, it's the entropy off Yujun multiplied by the number of malls. So we have formula here. Energy is equal to until we are few. Chain multiply must divided by Mueller Moss is equal to 4.60 Killer Joel Permal multiply 13.3 g, divided by 82.9 grand. Permal is equal to 0.7 380 Killer Joel. So energy released here is 0.73 or zero killer job.


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