91Ó°ÊÓ

What phase changes, if any, occur if a sample of \(\mathrm{CO}_{2}\) initially at \(-80^{\circ} \mathrm{C}\) and 5.0 atm is warmed to \(-25^{\circ} \mathrm{C}\) and 5.0 atm?

Below what temperature can solid \(\mathrm{CO}_{2}\) (dry ice) be converted into \(\mathrm{CO}_{2}\) gas simply by lowering the pressure?

What is the maximum pressure at which solid \(\mathrm{CO}_{2}\) (dry ice) can be converted into \(\mathrm{CO}_{2}\) gas without melting?

Predict the phase of water that exists under the following conditions: a. 2 atm of pressure and \(110^{\circ} \mathrm{C}\) b. 0.5 atm of pressure and \(80^{\circ} \mathrm{C}\) c. \(7 \times 10^{-3}\) atm of pressure and \(3^{\circ} \mathrm{C}\)

Which phase or phases of water exist under the following conditions? a. 0.32 atm and \(70^{\circ} \mathrm{C}\) b. 300 atm and \(400^{\circ} \mathrm{C}\) c. 1 atm and \(0^{\circ} \mathrm{C}\)

List the steps you would take to convert a sample of water at \(25^{\circ} \mathrm{C}\) and 1 atm pressure to water at its triple point.

List the steps you would take to convert a \(10.0 \mathrm{g}\) sample of water at \(25^{\circ} \mathrm{C}\) and 2 atm pressure to ice at 1 atm pressure. At what temperature would the water freeze?

Concept Review Explain why a needle floats on the surface of water but sinks in a container of methanol.

Explain why different liquids do not reach the same height in capillary tubes of the same diameter.

Explain why the plumbing in a house may burst if the temperature in the house drops below \(0^{\circ} \mathrm{C}.\)