question archive At 100 ?C and 1 atm, water is in which phase? solid liquid gas supercritical fluid solid-liquid equilibrium liquid-gas equilibrium solid-gas equilibrium At -10 ?C and 2 atm carbon dioxide is in the gas phase

At 100 ?C and 1 atm, water is in which phase? solid liquid gas supercritical fluid solid-liquid equilibrium liquid-gas equilibrium solid-gas equilibrium At -10 ?C and 2 atm carbon dioxide is in the gas phase

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At 100 ?C and 1 atm, water is in which phase?

solid
liquid
gas
supercritical fluid
solid-liquid equilibrium
liquid-gas equilibrium

solid-gas equilibrium

At -10 ?C and 2 atm carbon dioxide is in the gas phase. From these conditions, how could the gaseous CO2 be converted into liquid CO2?

Increase the temperature.
Decrease the temperature.
Increase the pressure.
Decrease the pressure.

 Part B ReviewI Constants Periodic Table Enter the critical temperature of water Phase diagrams for water (Figure 1)and carbon dioxide (Figure 2)are given here for your reference Express your answer with the appropriate units. View Available Hint(s) DéplaG Sn?? undo redoreset keyboard shortcuts help Value Units Submit Part C At-78 °C and 5.2 atm, carbon dioxide is in which phase? View Available Hint(s) O solid O liquid o gas O supercritical fluid O solid-liquid equilibrium O liquid-gas equilibrium O solid-gas equilibrium O solid-liquid-gas equilibrium Figure 1 of 2 Phase diagram for H20 218 Liquid Solid Submit 0.006 Gas 100 374 Part D Temperature ("C)

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Answer:-

(I) As we know that the boiling point of water is 100 0C at which vapor pressure of water becomes equal to the atmospheric pressure i.e 1 atm. At boiling point of water i.e 100 0C there is equilibrium between liquid water and gaseous water (water vapors).

liquid water \rightleftharpoons water vapors

therefore correct option is At 100 0C and 1 atm, water is in liquid-gas equilibrium.

(II) As we know that the critical temperature is that temperature above which a gas or vapors of any liquid cannot be liquefied on applying the pressure  therefore as mentioned in phase diagram of water, there is 374 0C above which water exists as water vapors form So 374 0C i.e 374 + 273 = 647 K is the critical temperature of water.

(III) At - 78 0C and 5.2 atm carbon dioxide exists in solid phase as mentioned in phase diagram of carbon dioxide (CO2) gas.

(IV) At -10 ?C and 2 atm carbon dioxide is in the gas phase. it can be liquefied into liquid state from the gaseous state on applying the pressure because as we know that the critical temperature of  carbon dioxide (CO2) gas is 31.1 0C therefore carbon dioxide (CO2) gas can not be liquefied above this temperature and below this temperature carbon dioxide (CO2) gas can be liquefied on increasing the pressure.

therefore correct option is Increase the pressure

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