Imfs Study guides, Class notes & Summaries

What is a solute? : the substance that is dissolved What is a solvent? : the substance in which the solute dissolves Usually, is there more solvent or solute present in a solution? : solvent When determining the enthalpy of solution, is deltaH1 and deltaH2 endothermic or exothermic? : endothermic Why are deltaH1 and deltaH2 endothermic processes? : the attractive forces between particles must be overcome to expand solute and solvent What type of process is deltaH3 in finding deltaHsoln...

Chem 210 Exam 1 Questions & Answers(Graded A+) Intermolecular forces - ANSWER- non bonding forces - found BETWEEN molecules - influence the energy physical properties of the substances Physical properties examples - ANSWERboiling point, melting point, solubility, color, odor, etc. T/F: stronger intermolecular forces correlate to a higher boiling point - ANSWERTrue Kinetic energy - ANSWER- provides the energy needed to overcome intermolecular forces What is kinetic energy ass...

CEM 142 EXAM 1 LATEST UPDATE GRADED A+ bond BREAKING ABSORB energy from surroundings -requires energy to overcome bond FORMING RELEASE energy to surroundings effective nuclear charge charge felt by valence electrons -increase in ENC attracts electrons more strongly toward the nucleus Coulomb's Law opposite charges attract -like charges repel F=kq1q2/r^2 electron pair geometry SHAPE INCLUDING LONE PAIRS -count as bonds molecular shape not including lone pairs ...

The phase in which a substance exists depends on the relative extents of its- correct answer: Intermolecular forces and kinetic energies of its molecules van der Waals forces correct answer: a slight attraction that develops between the oppositely charged regions of nearby molecules Londen dispersion forces correct answer: attraction between two rapidly fluctuating, temporary dipoles; significant only when particles are very close together instantaneous dipole correct answer: a flee...

Chem 104 1st exam|Complete Questions with 100% Correct Answers What are hybrid orbitals? orbitals of equal energy produced by the combination of two or more orbitals on the same atom What are the types of hybrid orbitals SP- 2 regions of density SP^2- 3 regions of density(3sp^2s) SP^3- 4 regions (4 sp^3s) What are the 4 types of hydrocarbons alkanes, alkenes, alkynes, and aromatic hydrocarbons Alkane a hydrocarbon containing only single covalent bonds Alkene a hydrocarbon that contai...

Intermolecular forces - ANSWER- non bonding forces - found BETWEEN molecules - influence the energy physical properties of the substances Physical properties examples - ANSWERboiling point, melting point, solubility, color, odor, etc. T/F: stronger intermolecular forces correlate to a higher boiling point - ANSWERTrue Kinetic energy - ANSWER- provides the energy needed to overcome intermolecular forces What is kinetic energy associated with? - ANSWERThe random motion of particles...

The phase in which a substance exists depends on the relative extents of its- correct answer: Intermolecular forces and kinetic energies of its molecules van der Waals forces correct answer: a slight attraction that develops between the oppositely charged regions of nearby molecules Londen dispersion forces correct answer: attraction between two rapidly fluctuating, temporary dipoles; significant only when particles are very close together instantaneous dipole correct answer: a flee...

CHEM 219 Final Test with Complete Solutions How are frequency and wavelength related? - Answer-They are inversely proportional Which elements can have hydrogen bonding? - Answer-Oxygen, Nitrogen and Flourine Molarity is - Answer-moles of solute/liters of solution M/L Molality is - Answer-moles of solute/kg of solvent a solute is - Answer-A substance that is dissolved in a solution. a solvent is - Answer-A liquid substance capable of dissolving other substances vapor pressur...

Matse 201 Exam 1 With Complete Solutions Metals metallic bonding where electrons are delocalized - dense, stiff, strong, ductile - high thermal & electrical conductivity - opaque, reflective Polymers/plastics covalent bonding where electrons are shared - soft, ductile, low strength, low density - thermal & electrical insulatiors - optically translucent or transparent Ceramics ionic bonding where electrons are donated and received - oxides, nitrides, carbides - hard, brittle...

Crystalline solid : a solid made of an ordered array of atoms, ions, or molecules Amorphous solid : a solid that lacks long-range order for the atoms, ions, or molecules in its structure Molecular solid : a solid formed by neutral, covalently bonded molecules held together by IMFs Ionic solid : a solid consisting of monatomic or polyatomic ions held together by ionic bond