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At standard temperature and pressure the molar volumes of

Chapter , Problem 11.13

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QUESTION:

At standard temperature and pressure the molar volumes of Cl2 and NH3 gases are 22.06 and 22.40 L, respectively. (a) Given the different molecular weights, dipole moments, and molecular shapes, why are their molar volumes nearly the same? (b) On cooling to 160 K, both substances form crystalline solids. Do you expect the molar volumes to decrease or increase on cooling the gases to 160 K? (c) The densities of crystalline Cl2 and NH3 at 160 K are 2.02 and 0.84 g>cm3 , respectively. Calculate their molar volumes. (d) Are the molar volumes in the solid state as similar as they are in the gaseous state? Explain. (e) Would you expect the molar volumes in the liquid state to be closer to those in the solid or gaseous state?

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QUESTION:

At standard temperature and pressure the molar volumes of Cl2 and NH3 gases are 22.06 and 22.40 L, respectively. (a) Given the different molecular weights, dipole moments, and molecular shapes, why are their molar volumes nearly the same? (b) On cooling to 160 K, both substances form crystalline solids. Do you expect the molar volumes to decrease or increase on cooling the gases to 160 K? (c) The densities of crystalline Cl2 and NH3 at 160 K are 2.02 and 0.84 g>cm3 , respectively. Calculate their molar volumes. (d) Are the molar volumes in the solid state as similar as they are in the gaseous state? Explain. (e) Would you expect the molar volumes in the liquid state to be closer to those in the solid or gaseous state?

ANSWER:

Problem 11.13At standard temperature and pressure the molar volumes of Cl and NH gases are 22.06 and 2 322.40 L, respectively. (a) Given the different molecular weights, dipole moments, and molecularshapes, why are their molar volumes nearly the same (b) On cooling to 160 K, bothsubstances form crystalline solids. Do you expect the molar volumes to decrease or increase oncooling the gases to 160 K (c) The densities of crystalline Cl and 2H at 1603K are 2.02 and0.84 g/cm3 , respectively. Calculate their molar volumes. (d) Are the molar volumes in the solidstate as similar as they are in the gaseous state Explain. (e) Would you expect the molarvolumes in the liquid state to be closer to those in the solid or gaseous state Step-by-step solution Step 1 of 6 ^Molar volume is defined as the volume occupied by one mole of a substance at standardconditions. It is maximum in gaseous state due to decreased intermolecular forces of attractionprevailing in them.

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