Chem 101 3rd Exam

Condensation

Gas to Liquid

Evaporation

Liquid to Gas

Freezing

Liquid to Solid

Melting

Solid to Liquid

Sublimation

Solid to Gas

Deposition

Gas to Solid

Calories

(Specific Heat)(Mass)(Difference of Temp) or (Heat of fusion or vaporation)(Mass)

More Vapor Pressure

Higher temp = ?

Ionic Solids

High melting point, very hard, many soluble in H2O, crystal structures, Ex. NaCl, K2O, CaCl2

Covalent Network Solid

Ex. diamond, solid is one molecule, cannot melt

Molecular Solids

discreet molecules are in the corners, very easy to melt, ex. dry ice, ice,

Metallic Solids

Simple Metals, Ex. Al, Cu, Fe, Mg

Heating

A - B

Melting

B - C

Liquid Heating

C - D

Boiling

D - E

Heating Up Steam

E - F

False

The Melting Point of metallic sodium is 97.83 C so at a temp of 25 C, it is a liquid

True

The solvent in an aqueous solution is always water

True

Network covalent substances have one of the highest melting points of all substances

False

Water is a liquid at room temp, due to its very small mass

True

When heat is first added to an ice/water mixture at 0 C, the temp of the water will not increase until all the ice has melted

False

Adding a non-volatile solute to water will cause the vapor pressure to increase

False

At the same temp, all liquids have the same vapor pressure

False

Dialysis membranes have smaller pores than osmotic membranes

True

Glucose (a small polar molecule) can move through a dialysis membrane but not an osmotic membrane

False

All reactions are reversible

False

When we say that an equilibrium lies to the left, it means that the concentration of the reactants is less than that of the products

True

The larger the energy of activation, the slower the reaction

False

If the chemical energy of the products is less than the chemical energy of the reactants, the reaction is always very fast

exothermic

Steam becoming boiling water (endothermic, exothermic, cannot tell)

exothermic

Metabolizing of chocolate donut (endothermic, exothermix, cannot tell)

endothermic

Photosynthesis (endothermic, exothermix, cannot tell)

cannot tell

A reaction with a very high energy of activation (endothermic, exothermix, cannot tell)

endothermic

Melting iron to molten iron (endothermic, exothermix, cannot tell)

endothermic

Electrolysis of water (to H2 and O2) (endothermic, exothermix, cannot tell)

endothermic

A reaction where the products have more chemical energy than the reactants (endothermic, exothermix, cannot tell)

endothermic

A reaction with a + delta H (endothermic, exothermix, cannot tell)

Precipitation

The process where an insoluble solid separates from the solution

dissolving

The process where a soluble solid goes into solution

Condensation

Name of the process of converting a gas to a liquid

freezing

The process of a liquid going to a solid

evaporation

Name of the process of converting a liquid to a gas

melting

The process of converting a solid to a liquid

sublimation

The process of converting a solid directly to a gas

heat of vaporization

The heat needed to convert 1 gram of a substance from a liquid to a gas

miscible

The term used for two liquids that make a uniform solution when mixed together

alloy

What is a solution of two or more metals called?

specific heat

the heat needed to raise the temp of 1 gram of substance 1 C

viscosity

What is the resistance to flow for a liquid called?

heat of fusion

the heat needed to convert 1 gram of substance from a solid to a liquid

osmotic membranes

type of semi-permeable membrane where only solvent molecules can move through

dialysis membrane

the kidneys are what type of membrane

isotonic

two solutions with equal concentration of solutes are called this

osmols

what is the term for moles of particles

dialysis membrane

type of semi-permeable membrane where the solvent and very small molecules can move through

equilibrium

the situation when the rate of a forward reaction equals the rate in the reverse reaction