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Magazine Chapter 10: Q10.4-58 E (page 589)
Determine the phase changes that carbon dioxide undergoes as the pressure changes if the temperature is held at 鈭�50掳C? If the temperature is held at 鈭�40掳C? At 20掳C?
Short Answer
If the temperature is constant at\(\left( {{\rm{ - 5}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}} \right){\rm{,C}}{{\rm{O}}_{\rm{2}}}\)will be:
- gaseous if the pressure is approximately 10-700 kPa
- liquid if the pressure is approximately\({\rm{700 - 200,000kPa}}\)
-solid if the pressure is higher than\({\rm{200,000kPa}}\)
If the temperature is constant at\(\left( {{\rm{ - 4}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}} \right){\rm{,C}}{{\rm{O}}_{\rm{2}}}\)will be:
- gaseous if the pressure is approximately 10-1000 kPa
- liquid if the pressure is approximately\({\rm{1000 - 400,000kPa}}\)
-solid if the pressure is higher than\({\rm{400,000kPa}}\)
If the temperature is constant at\(\left( {{\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}} \right){\rm{,C}}{{\rm{O}}_{\rm{2}}}\)will be:
- gaseous if the pressure is approximately\({\rm{10 - 9000kPa}}\)
- liquid if the pressure is approximately\({\rm{9000 - 900,000}}\,{\rm{kPa}}\)
-solid if the pressure is higher than\({\rm{900,000}}\,{\rm{kPa}}\)
Step by step solution
To determine the phase changes held at \({\rm{ - 5}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\)
Let us determine the phase changes that \({\rm{C}}{{\rm{O}}_2}\)undergoes as the pressure changes if the temperature is 鈭�50掳C
Here we can see that, if the temperature is constant \(\left( {{\rm{ - 5}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}} \right){\rm{,C}}{{\rm{O}}_{\rm{2}}}\) will be:
- gaseous if the pressure is approximately 10-700 kPa
- liquid if the pressure is approximately\({\rm{700 - 200,000kPa}}\)
-solid if the pressure is higher than \({\rm{200,000kPa}}\)
To determine the phase changes held at \({\rm{ - 4}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}\)
If the temperature is constant \(\left( {{\rm{ - 4}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}} \right){\rm{,C}}{{\rm{O}}_{\rm{2}}}\)will be:
- gaseous if the pressure is approximately 10-1000 kPa
- liquid if the pressure is approximately\({\rm{1000 - 400,000kPa}}\)
-solid if the pressure is higher than \({\rm{400,000kPa}}\)
To determine the phase changes held at \(\left( {{\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}} \right)\)
If the temperature is constant at\(\left( {{\rm{2}}{{\rm{0}}^{\rm{^\circ }}}{\rm{C}}} \right){\rm{,C}}{{\rm{O}}_{\rm{2}}}\)will be:
-gaseous if the pressure is approximately 10-9000 kPa
-liquid if the pressure is approximately\(9000 - 900,000{\rm{kPa}}\)
-solid if the pressure is higher than \(900,000{\rm{kPa}}\)
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