Ejercicios de Sólidos, energía reticular y fuerzas intermoleculares

10 ejercicios de Sólidos, energía reticular y fuerzas intermoleculares que han salido en los exámenes de Complements de química de la URV (Grado en Química)…

Problema 7 · 2023

Ordeneu justificadament en ordre creixent els compostos moleculars següents segons el seu punt de fusió, i comenteu el seu estat d'agregació en condicions normals de pressió i temperatura: NH3, F2, HCl, CF4, He.

Question 7 · Juny 2023

Calculate the density of calcium in g/cm³ given ccp structure, atomic weight 40.1 g/mol and unit cell edge 5.56 Å, and explain its electrical conductivity behavior based on band theory.

Question 8 · Juny 2023

Potassium bromide (KBr) adopts a halite/rock-salt crystal structure. Calculate the theoretical lattice energy using the Born-Landé equation, the experimental lattice energy from the Born-Haber cycle, and the resulting non-ionic (covalent) character percentage.

Question 9 · Juny 2023

Classify Na, NaCl, MgO, HF, and Co as molecular or non-molecular, specify the primary type of bonding in each, and arrange them in descending order of their expected melting points.

Pregunta 6 · 2022

Comparar el punt d'ebullició entre l'etanol i el dimetil èter (isòmers de fórmula C2H6O) i raonar la resposta segons les forces intermoleculars presents en cadascun.

Question 8 · Exam Bridging Courses in Chemistry

Consider the unit cells for crystalline solids A and B: a. Identify the packing type for the main lattice, the type and fraction of occupied interstitial holes for each cell, and the archetype structure name. b. State the coordination number of each ion/atom in both unit cells. c. Propose the predominant type of…

Question 9 · Exam Bridging Courses in Chemistry

Using band theory and electronic structure principles, briefly explain why metallic chromium (Cr) is an electrical conductor, germanium (Ge) acts as a semiconductor, and silicon dioxide (SiO2) behaves as an electrical insulator.

Question 10 · Exam Bridging Courses in Chemistry

Rank Li, LiCl, Ar, Fe, BaO, and NH3 in descending order of melting point, and classify each by nature (molecular vs non-molecular), constitutional units, and primary bonding type.

Question 11 · Exam Bridging Courses in Chemistry

Calculate the experimental lattice energy of LiF from a Born-Haber cycle, the theoretical lattice energy from the Born-Landé equation, and evaluate the non-ionic (covalent) percentage contribution.

Pregunta 7 · Examen Primer Parcial. Complements de Química

Rank the following substances in order of increasing melting point (or boiling point/stability in condensed phase) and explain the trend based on intermolecular forces: NH3, F2, HCl, CF4, He.

Otros temas de Complements de química