Question

I want to see the calculation process; I don’t understand it

Is 273K incorrect? It should be 273C

154/22.4=6.875, the answer is wrong

I checked several versions and it’s all A

(A) 6.87 (B) 4.52 (C) 3.70 (D) 3.44 The order of the answers is incorrect

If the theoretical basis is correct, then the calculations will be right; believe in yourself: lol

Please note: What is the state of CCl4 at 0 degrees and 1 atmosphere of pressure?

Carbon tetrachloride is an organic compound with the chemical formula CCl4. It is a colorless, toxic liquid that can dissolve fats, paints, and various other substances; it is volatile and has a slightly sweet odor similar to that of chloroform. It has a molecular weight of 153.84; at normal temperature and pressure, its density is 1.595 g/cm3 (at 20°C), its boiling point is 76.8°C, its vapor pressure is 15.26 kPa (at 25°C), and the density of its vapor is 5.3 g/L. Carbon tetrachloride is immiscible with water, but it is miscible with ethanol, ether, chloroform, and petroleum ether. It is not flammable and was once used as a fire extinguishing agent. However, it was discontinued because it reacts with water at temperatures above 500 degrees Celsius to produce carbon dioxide as well as toxic gases such as phosgene, chlorine, and hydrogen chloride. Additionally, it accelerates the breakdown of the ozone layer. The use of carbon tetrachloride is **strictly limited**; it is only permitted for use as a raw material in substances that do not deplete the ozone layer and for specific purposes, and it is not commonly used as an extractant. On October 27, 2017, the International Agency for Research on Cancer under the World Health Organization published a preliminary list of carcinogens, placing carbon tetrachloride in Group 2B of carcinogens. Chinese name: Carbon tetrachloride; English name: Carbon tetrachloride; Other names: Tetrachloromethane; Chemical formula: CCl₄; Molecular weight: 153.84; CAS registry number: 56-23-5; Melting point: -22.92°C; Boiling point: 76.8°C; Water solubility: 0.8 g/L (20°C); Density: 1.595 g/cm³ (20°C); Appearance: Colorless liquid; Applications: Extractant; Hazard description: Toxic; can cause chemical damage to organs; Chemical category: Organic compounds–Chlorides; Regulation status: Not regulated; Storage method: Store in a sealed or water-sealed container. Table of contents: 1. Numbering system; 2. Physical and chemical properties ▪ Physical properties ▪ Chemical properties; 3. Molecular structure data; 4. Computational chemistry data; 5. Uses; 6. Precautions ▪ Hazards ▪ First aid measures ▪ Fire-fighting measures ▪ Spill handling ▪ Additional precautions ▪ Toxicology; 7. Ecological data; 8. Production methods; 9. Raw materials; 10. Safety information ▪ Hazard symbols ▪ Safety phrases ▪ Hazard statements; 11. Toxicity analysis. Numbering system: CAS number: 56-23-5; MDL number: MFCD00000785; EINECS number: 203-453-4; RTECS number: 203-453-4; BRN number: 1098295; PubChem number: 24857387. Physical and chemical properties: Physical properties: Appearance and characteristics: Colorless, transparent volatile liquid with a distinctive aromatic odor. It tastes sweet. Relative density (water=1): 1.595; Relative vapor density (air=1): 5.32; Saturated vapor pressure (kPa): 15.26 (25°C); Heat of combustion (kJ/mol): 364.9; Refractive index: 1.459–1.46; Critical temperature (°C): 283.2; Critical pressure (MPa): 4.558; Logarithm of the octanol/water partition coefficient: 2.6; Interfacial tension with water at 20°C (mN/m): 45.0; Solubility: Slightly soluble in water, readily soluble in most organic solvents. Relative density (25°C, 4°C): 1.5846; Refractive index at room temperature (n25): 1.4573; Vapor pressure (kPa, 20°C): 11.9102; Critical density (g·cm-3): 0.557; Critical volume (cm3·mol-1): 276; Critical compression factor: 0.272; Eccentricity factor: 0.193; Lennard-Jones parameter (A): 7.949; Lennard-Jones parameter (K): 633.6; Solubility parameter (J·cm-3)0.5: 17.577; van der Waals area (cm2·mol-1): 7.280×109; van der Waals volume (cm3·mol-1): 52.300; Standard enthalpy of formation in the gas phase (kJ·mol-1): -95.8; Standard entropy in the gas phase (J·mol-1·K-1): 310.02; Standard free energy of formation in the gas phase (kJ·mol-1): -53.5; Standard heat capacity in the gas phase (J·mol-1·K-1): 83.43; Standard enthalpy of formation in the liquid phase (kJ·mol-1): -128.41; Standard entropy in the liquid phase (J·mol-1·K-1): 216.19; Standard free energy of formation in the liquid phase (kJ·mol-1): -60.50; Standard heat capacity in the liquid phase (J·mol-1·K-1): 131.4; Chemical properties: Stable chemically. It has a pleasant smell. Toxic. Does not burn. It can be hydrolyzed to phosgene at high temperatures ； Chloroform can be obtained through reduction. Molecular structure data: 1. Molar refractivity: 26.04 2. Molar volume (cm3/mol): 90.6 3. Isotropic volume (90.2 K): 220.7 4. Surface tension (dyne/cm): 35.2 5. Polarizability (10-24 cm3): 10.32 Computational chemistry data: 1. Hydrophobicity parameter value (XlogP): 2.8 2. Number of hydrogen bond donors: 0 3. Number of hydrogen bond acceptors: 0 4. Number of rotatable chemical bonds: 0 5. Number of tautomers: None 6. Topological polar surface area: 0 7. Number of heavy atoms: 5 8. Surface charge: 0 9. Complexity: 19.1 10. Number of isotopic atoms: 0 11. Number of defined atomic chiral centers: 0 12. Number of undefined atomic chiral centers: 0 13. Number of defined chemical bond chiral centers: 0 14. Number of undefined chemical bond chiral centers: 0 15. Number of covalent bond units: 1 Uses: It was once widely used as a solvent, fire extinguishing agent, chlorinating agent for organic compounds, extractant for fragrances, degreasing agent for fibers, steaming agent for grains, extraction agent for drugs, organic solvent, and dry cleaning agent for fabrics. However, due to its toxicity and role in damaging the ozone layer, its use is now very limited and its production is restricted; many of its applications have been replaced by substances such as dichloromethane. It can also be used to synthesize fluorochloroalkanes and the monomers for nylon 7 and nylon 9 ； Trichloromethane and drugs can also be produced ； Used as a lubricant in metal cutting.