Determine which state this substance is in at 1 atm and 298 K by referring to its phase diagram. Liquid Solid 2.55 atm - Gas 225 K Temperature b) liquid d) all three states in equilibrium a) solid e) gas Pressure

Answer the following questions concerning vapor pressure. a) Why doesn't a change in the surface area of a liquid cause a change in the equilibrium vapor pressure?     b) What effect does increasing the temperature have on the equilibrium vapor pressure of a liquid? Explain!

Which statement is correct about the boiling? select the correct answer. O a. a dynamic equilibrium exists between the liquid and vapor phase. O b. the molecular bonds in the liquid are broken rapidly. O c. the vapor pressure of the liquid equals the external pressure above the liquid surface. O d. the vapor pressure of the liquid equals the pressure exerted by its vapor phase. O e. the vapor pressure of the liquid is less than the external pressure above the liquid surface. A Moving to another question will save this response. 234 44,461 23 APR 13 étv

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d• Using the phase diagram to the right, select all of the statements that are false. f Te Temperature (not to scale) Point G is the Critical Point. The substance is a supercritical fluid at Point F Decreasing the pressure of the substance at constant Temperature from point A, will result in vaporization Cooling the substance at Point F will induce condensation There is an equilibrium in the gaseous and liquid states at Point E. Increasing the temperature at constant pressure from Point A will results in two phase changes in the substance. Pressure (not to scale)

An unknown liquid has a heat of vaporization of 9.40 kJ/mole. If the vapor pressure of this liquid at -193 degrees C is 111 torr, what is the normal boiling point of this liquid in degrees C? HINT: Normal boiling point occurs when the vapor pressure of the liquid is the same as atmospheric pressure (1 atm or 760 mm Hg).

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In what phase is CO₂ at 72 atm and 0 °C? 2 liquid gas solid Starting from the same point, 72 atm and 0 °C, what phase change would eventually result from a decrease in pressure? O melting O freezing O deposition sublimation O vaporization condensation Pressure (atm) 5.11 1.0 solid -78.5 -56.4 liquid Temperature (°C) gas 1 31.1

Below is the phase diagram for iodine. If you start with a sample of iodine at 150°C and 1.0 atm and you increase the temperature, what phase change will you observe? a. boiling b. melting c. sublimation d. melting, then boiling

5.What happens when the vapor pressure of a liquid is equal to the external pressure? A) An equilibrium exists between the liquid and the solid state. B) The liquid freezes. C) The intermolecular forces become stronger in the liquid. D) The liquid boils. E) Dispersion forces become weaker in the liquid.