Chm 1046 Study guides, Class notes & Summaries

intermolecular forces definition forces of attraction between molecules intramolecular forces definition forces of attraction within molecules, stronger than intermolecular forces ion-ion forces Very strong electrostatic forces between oppositely charged ions. same force as ionic bonds (#1 intermolecular force) ion-dipole forces attractive forces between an ion and a polar molecule (#2 intermolecular force) polarity based on electronegativity; everything with oxygen is polar unless s...

Which of the following processes would you expect the entropy of the system to decrease? I. evaporating a liquid II. decreasing the temperature of a gas III. melting a solidII only The boiling point of pure methanol (CH3OH) is 338K and the boiling point of pure ethanol (CH3CH2OH) is 351K why is the boiling point of ethanol higher than methanol? a. because ethanol forms more hydrogen bonding interactions per molecule than methanol. b. because ethanol has a larger electron cloud and ther...

Cholestericliquid crystals are colored and change color with temperature changes. Nematicliquid crystal has the least order and is the most liquid-like. 3There are ________ types of smectic liquid-crystalline phases. at the melting point of the solidFor a given substance that exhibits liquid-crystalline properties, the transition from solid to liquid-crystal state occurs only single bondsMolecules with ________ do not generally exhibit liquid-crystalline properties because they lack the ...

covalent networkA solid has a very high melting point, great hardness, and poor electrical conduction. This is a(n) ________ solid. supercriticalAll of the following are a type of solid except ________. A) supercriticalB) ionicC) molecular D) covalent network E) metallic a long-range repeating pattern of atoms, molecules, or ionsCrystalline solids differ from amorphous solids in that crystalline solids have ___ primitive cubicThe unit cell with all sides the same length and all angles ...

Which of the following processes would you expect the entropy of the system to decrease? I. evaporating a liquid II. decreasing the temperature of a gas III. melting a solidII only The boiling point of pure methanol (CH3OH) is 338K and the boiling point of pure ethanol (CH3CH2OH) is 351K why is the boiling point of ethanol higher than methanol? a. because ethanol forms more hydrogen bonding interactions per molecule than methanol. b. because ethanol has a larger electron cloud and ther...

intermolecular forces definition forces of attraction between molecules intramolecular forces definition forces of attraction within molecules, stronger than intermolecular forces ion-ion forces Very strong electrostatic forces between oppositely charged ions. same force as ionic bonds (#1 intermolecular force) ion-dipole forces attractive forces between an ion and a polar molecule (#2 intermolecular force) polarity based on electronegativity; everything with oxygen is polar unless s...

Cholestericliquid crystals are colored and change color with temperature changes. Nematicliquid crystal has the least order and is the most liquid-like. 3There are ________ types of smectic liquid-crystalline phases. at the melting point of the solidFor a given substance that exhibits liquid-crystalline properties, the transition from solid to liquid-crystal state occurs only single bondsMolecules with ________ do not generally exhibit liquid-crystalline properties because they lack the ...

covalent networkA solid has a very high melting point, great hardness, and poor electrical conduction. This is a(n) ________ solid. supercriticalAll of the following are a type of solid except ________. A) supercriticalB) ionicC) molecular D) covalent network E) metallic a long-range repeating pattern of atoms, molecules, or ionsCrystalline solids differ from amorphous solids in that crystalline solids have ___ primitive cubicThe unit cell with all sides the same length and all angles ...

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