CH 2 FINAL EXAM GUIDE Flashcards
what is an extensive property
An extensive property is a property of matter that changes as the amount of matter changes. Like other physical properties, an extensive property may be observed and measured without any chemical change (reaction) occurring.
Are Mass and Volume Intensive or Extensive properties?
Extensive. As more matter is added to a system, both mass and volume changes.
what is an intensive property?
Intensive properties do not depend on the amount of matter in a sample. They are the same whether you’re looking at a large amount of material or tiny quantity. An example of an intensive property is electrical conductivity. The electrical conductivity of a wire depends on its composition, not the length of the wire.
Are Bioling Point, Color, Density and solubility are intensive or extensive properties?
boiling point, color, density and solubility are all examples of intensive properties.they are the same no matter how much of it you’re viewing.
Difference between Physical vs. Chemical properties?
A physical property is an aspect of matter that can be observed or measured without changing its chemical composition. Examples of physical properties include color and volume. The only way to observe a chemical property is by performing a chemical reaction. Examples of chemical properties include reactivity, flammability and oxidation states.
Label the following as a chemical or physical change… ability to rust
chemical
Label the following as a chemical or physical change.. melting point.
physical, since the chemical identity of the matter in question is unchanged, this process represents a physical change.
Label the following as a chemical or physical change.. brittleness.
Brittleness is a physical property i.e. a consequence of how the atoms or other simplest unit (polymeric chain) is arranged in the physical space/system so that it breaks under a physical stress.
Label the following as a chemical or physical change.. reactivity with vinegar.
chemical: reacts with vinegar to produce a new substance
Label the following as a chemical or physical change.. flammability.
flammability is a chemical property of matter because the only way to know how readily a substance ignites is to burn it. In the chemical reaction for combustion, the reactants and products are different.
Label the following as a chemical or physical change.. density.
physical
is the following a physical or chemical change; cut your hair
physical
is the following a physical or chemical change: baking soda reacts with vinegar and forms a gas
chemical
is the following a physical or chemical change: piece of metal is bent in half
physical
is the following a physical or chemical change: an aspirin is crushed into fine powder
physical
