Exam 6: Gases, Liquids, Solids, and Intermolecular Forces

Supercritical water and scCO₂ are "generally regarded as safe" by the U.S.Food and Drug Administration and are often used in the food industry.

Methanol

At STP,1 mole of oxygen gas,O₂,will have a mass of

When an ionic compound dissolves in water,

The ideal gas law can be used to determine a new volume for a gas when its temperature is changed.

A solution is a heterogeneous mixture.

All of the following statements about scCO₂ are correct EXCEPT

Which of the following is NOT a property of an ionic compound? Ionic compounds generally

According to the kinetic-molecular theory,there is very little attraction between particles of a gas.

The temperature at which a solid melts is the melting point of the solid.The melting point is an indication of the intermolecular forces that hold the solid together.Water melts at 0°C.Table sugar (sucrose)melts at 285°C.Gallium,Ga,melts at 30°C.Which one of the following ranks the intermolecular forces in these solids from the strongest to the weakest?

The conditions for standard temperature and pressure (STP)are 1 atm pressure and 0°C.

Which state of matter is characterized by having molecules far apart and moving randomly?

Supercritical fluids require the use of special equipment to control the temperatures and high pressures needed for their use.

Methanol has the formula CH₃OH.What is the predominant intermolecular force between methanol molecules?

The process by which a solid is converted to a gas is called

Assume that you have a sample of a gas.You know the volume,the temperature and the number of moles of the sample.Which of the following laws would you use if you wanted to calculate the pressure of the sample?

A gas is enclosed in a 10.0 L tank at 1200 mm Hg pressure.Which of the following is a reasonable value for the pressure when the gas is pumped into a 5.00 L vessel?

What type of forces exist between bromine molecules in liquid bromine?

Which of the following is the weakest?

The process by which a liquid is converted to a gas is called