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CountryBoy15
 one year ago
need help please help
Name and describe the phase change that occurs when solid carbon dioxide (dry ice) is placed in an open container at room temperature.
CountryBoy15
 one year ago
need help please help Name and describe the phase change that occurs when solid carbon dioxide (dry ice) is placed in an open container at room temperature.

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Photon336
 one year ago
Best ResponseYou've already chosen the best response.2@CountryBoy15 Look at this dw:1444191107393:dw

Photon336
 one year ago
Best ResponseYou've already chosen the best response.2well it's called sublimation solid goes directly to gas without going to the liquid phase \[(Solid) > (Gas) \]

Photon336
 one year ago
Best ResponseYou've already chosen the best response.2the solid ice goes directly to the gas phase without passing through the liquid phase

NotTim
 one year ago
Best ResponseYou've already chosen the best response.0Maybe ask this as a new question, countryboy15

Photon336
 one year ago
Best ResponseYou've already chosen the best response.2\[pV = nRT \] the temperature and number of particles (moles n) are constant so \[p_{1}V_{1} = p_{2}V_{2}\]

Photon336
 one year ago
Best ResponseYou've already chosen the best response.2We are looking for V_{2} so we isolate \[V_{2} = \frac{ P_{1}V_{1} }{ P_{2}}\]

Photon336
 one year ago
Best ResponseYou've already chosen the best response.2just plug in the numbers \[1 atm = 101.3kpA \] \[\frac{ 270 }{ 101.3} = 2.66atm = P_{1}\] \[\frac{ 540 }{ 101.3} =5.33 atm = P_{2}\] \[V_{1} = 1 L \]

Photon336
 one year ago
Best ResponseYou've already chosen the best response.2Plug the numbers above into this equation \[\frac{ P_{1}V_1 }{ P_{2} } = V_{2}\]

Photon336
 one year ago
Best ResponseYou've already chosen the best response.2\[\frac{ (1L)(2.66atm) }{ (5.33atm) } = 0.4 L~estimate \] the pressure went up so the volume went down. I didn't have a calculator i just estimated it.

Photon336
 one year ago
Best ResponseYou've already chosen the best response.2that's essentially what boyles law is pressure goes up volume goes down. opposite is true too
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