QUIZ

When a liquid evaporates, what is happening at the molecular level? 

What is the percentage of the gas or vapor concentration in air that will burn or explode if ignited?

At concentrations above the upper flammable limit (UFL), or upper explosive limit (UEL), a vapor or gas is too _____ to burn.

The point at which a fuel spontaneously ignites, even without ignition from an independent source is called the:

Atmospheric  _____ can control different variables such as the boiling point of a substance.

What is one way to reduce the vapor pressure of a container?

What happens when a material reaches a critical point?

Critical pressure is the pressure necessary to ____a gas at its critical temperature.

Which refers to the temperature above which the decomposition of an unstable substance continues unimpeded, regardless of the ambient or external temperature?

How is a substance’s self-accelerating decomposition temperature (SADT) related to its maximum safe storage temperature (MSST)?

In order for a solid to change state into a liquid, it must reach its:

In order for a liquid to solidify or crystallize, it must reach its:

What is it called when the vapor pressure of a liquid is equal to the atmospheric pressure around the liquid, and vapor bubbles are forming within the liquid?

What do you call the minimum temperature to which a substance must be heated to produce enough vapor to support sustained combustion?

If the temperature of a boiling liquid drops below its boiling point, and the vapors begin to condense back into a liquid, this is called:

What is the term for materials that readily change into a gas?

When a material changes its state from a solid directly to a vapor without passing through a liquid phase, it has

Hydrocarbons and derivatives with _____ molecular weight tend to be gases or nonviscous liquids.

What types of elements or materials repel water?

In what type of mixture are all the ingredients completely dissolved?

If you add a solid to water and the solid does not completely dissolve, you get a(an):

What does the concentration of a mixture tell you?

Two materials that will not mix or dissolve into one another, such as oil and water, are called:

Generally, heat _____ solubility for solids dissolved in liquids, and _____ the solubility of gases in solution.

For a material to be considered soluble in product research materials, how much of the material must dissolve?

Highly polar materials such as methanol and ethanol dissolve easily in water because water:

What physical property specifically compares the ratio of the density of a substance to the density of water?

A material’s state of matter may change if the _____ changes.  (28) [11.2.1] 

A _____ has a specific mass and volume and will take on a specific shape.

Which state of matter has a specific mass and volume but does not have a definitive shape?

Hazardous materials in _____ form are typically the most challenging to control.

A gas is a substance that will:

Atmosphere (atm), bar, and torr are measuring units of:

Non-liquefied compressed gases cannot be liquefied:

A gas cannot be liquefied by pressure alone if it is

Liquefied compressed gases and cryogenic liquids both have large vapor expansion rates which means that they will:

What is a hazard of released cryogenic liquids, liquefied gases, and compressed gases?

If a gas reaches the minimum temperature above which it cannot be liquefied no matter how much pressure is applied, then it has reached its:

How does the density of a substance usually change with temperature?

Which state of matter is usually the most mobile?

Specific gravity will vary depending on the _____ of the material.

If a material has a vapor density greater than 1, then that material will _____ in air.

Divide the molecular weight (MW) of the material by the average molecular weight of air (29) to estimate a material’s:

Most materials are _____ than air.

The ease with which a material will flow is called its:

The _____ of a chemical is its ability to remain in the environment when unconfined.

A chemical’s _____ _____ is the lowest concentration at which most people can smell it.

If the appearance of a material is significantly different than the description on the Safety Data Sheet (SDS), consider that the product:

A material in its solid state may still easily travel long distances in the air if it is:

What do you call the average kinetic energy of a substance’s particles?

At its _____ point, a material’s vapors will flash in the presence of an ignition source but will not continue to burn.