Draw a phase diagram for water. Label the axes, the states of matter, the triple point and the critical point. Draw a phase diagram for ammonia. Label the axes, the states of matter, the triple point and the critical point. Compare and contrast the two diagrams. Is liquid ammonia less dense that solid ammonia? Is liquid H20 less dense that solid H2O?

The vapor pressure of Substance X is measured at several temperatures: temperature vapor pressure 0.0249 atm 0 -69. °C -60. °C -51. °C 0.0625 atm 0.146 atm Use this information to calculate the enthalpy of vaporization of X. Round your answer to 2 significant digits. Be sure your answer contains a correct unit symbol. ロ･ロ X H 00 S

9C. The fuel in pocket lighters, butane, is a gas at room temperature with a boiling point of 0.0°C at 1.00 atm. However, butane is a liquid in these devices because the fuel is stored under pressure. Compute the minimum pressure required for butane to be a liquid at 25°C. In other words, compute the pressure at which its boiling point is 25°C. Some possibly useful information for butane: AH=4.661 kJ/mol AHvan-22.9 kJ/mol

Use the observation in the first column to answer the question in the second column. observation At 1 atm pressure, Substance C boils at 5. °C and Substance D boils at -31. °C. The enthalpy of vaporization of Substance A is smaller than that of Substance B. At 23 °C, Substance E has a vapor pressure of 105. torr and Substance F has a vapor pressure of 55. torr. question Which has a higher enthalpy of vaporization? Substance C Substance D Neither, C and D have the same enthalpy of vaporization. It's impossible to know without more information. At any temperature where both substances are liquid, which has the higher vapor pressure? Substance A Substance B Neither, A and B have the same vapor pressure. It's impossible to know without more information. Which has a higher boiling point? Substance E Substance F Neither, E and F have the same boiling point. It's impossible to know without more information.