Does the entropy of the system increase, decrease, or stay the same when a solid sublimes?

Q: The standard enthalpy of vaporization (H°vap) of ethylenediamine ((NH2CH2)2) is 44.0 kJ/mol. The…

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Q: Sucrose, a product of sugarcane manufacturing process, is highly soluble in water like many sugars,…

A: Colligative properties of a solution depends on the amount of solute present in the solution, not on…

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A: We know that a phase diagram is a chart used to show conditions (pressure, temperature, volume, etc)…

Q: (Q72) Why does the experimentally observed van't Hoff factor frequently differ from the predicted…

A: Answer: Von't hoff factor is the ratio of number of solute particles produced in the solution (due…

Q: Is it possible to freeze ammonia? What conditions would be necessary for frozen ammonia?

A: The phase diagram of the ammonia is given as,

Q: What can be said about the boiling point and strength of the intermolecular forces of a chemical…

A: The temperature at which a liquid boils or the temperature at which the vapour pressure of a…

Q: The total enthalpy change associated with forming a solution (ΔHsoln) can be broken down into three…

A: A solution is made up of two components: solute and solvent. To form a solution, the solute is added…

Q: In a case where pressure drops below triple point, explain what will happen to the phase transition…

A: Triple point is defined as the temperature and pressure at which solid, liquid and vapour phases of…

Q: Is it always the case that the formation of a liquid solution results in the release of energy? If…

A: Processes in which net energy is released are called exothermic while the processes in which energy…

Q: What are the accepted values for the molar heats of solution for sodium bicarbonate and sodium…

A: Using appendix for the accepted values of molar heats of solution.

Q: A mixture consists of 78,1 g benzene (C6H6) and 92,1 g toluene (C7H8). Both substances are volatile,…

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Q: The molar heat of solution of KBr is 19.9 kJ/mol.  If 0.65 moles of KBr are used, calculate the…

A: Given  Molar heat of solution of KBr                 = 19.9 KJ / mole   heat of solution for 0.65…

Q: Two phases "a" and "b"  of a pure substance are in equilibrium at some temperature and pressure.…

A: For any equilibrium to exist, there chemical potentials should be always equal. Hence ans will be…

Q: The point on a phase diagram is where three phases of matter exist in equilibrium. The point is…

A: Given:

Q: Question is attached

A: Vapor pressure is the pressure caused by the evaporation of liquids. If the vapour pressure of a…

Q: In a healthcare product, choose one property of this product.  Since a product is a bunch of…

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Q: A mixture consists of 78,1 g benzene (C6H6) and 92,1 g toluene (C7H8). Both substances are volatile,…

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Q: In pure butane there are only weak intermolecular interactions or dispersal forces. Dichloromethane,…

A: Solution - Butane is a non-polar molecule therefore it has London dispersion forces between…

Q: Why is it not advisable to freeze a sealed glass bottle that is completely filled with water? Use…

A: Substances generally expands on heating and contract on cooling. As a result, on heating its density…

Q: Please give me an example of a real-world application of cooling curves and determining a…

A: A question based on properties of solids that is to be accomplished.

Q: How does boiling point or freezing point affect the dissolution of a solid in water and its…

A: Boiling point is the temperature at which the compound starts boiling and its liquid phase converts…

Q: A solution is formed from dissolving 1 mole of Al(NO3)3 into enough water to have a total volume of…

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Q: In a healthcare product, choose one property of this product. (Except Protein) Since a product…

A: There are lots of healthcare product from various Pharmaceutical to cosmetics products or…

Q: If 94.0 g of ice (ΔHfus = 6.02 kJ/mol, at exactly 0°C) is added to a 240.-mL glass of room…

A: Total heat consumed by ice to melt is calculated as shown below where Qw is the total heat, ΔHfus is…

Q: Consider the natural environment of CO2. What is the difference between an open and closed system…

A: Carbon dioxide (chemical formula CO2) is a colorless gas with a density that is about 53% that of…

Q: The freezing point of a substance is the temperature at which the solid and liquid forms can coexist…

A: Depression in freezing point or elevation in boiling point are example of colligative property  Here…

Q: Hexane and heptane are miscible with eachother in all proportions. In making a solution of them,…

A: Two solutions of pure compound which possess similar kind of properties are generally miscible with…

Q: Explain how osmotic pressure measurements can be used to determine the molar mass of a polymer.

A: The properties that depend on the number of solute particles are called colligative properties. When…

Q: If the vacuum pump has sufficient capacity and is left on for an extended period of time, the liquid…

A: The boiling point of liquid nitrogen at atmospheric pressure is 77K.

Q: A mixture consists of 78,1 g benzene (C6H6) and 92,1 g toluene (C7H8). Both substances are volatile,…

A: Boiling point is defined as the temperature at which the vapor pressure of the liquid becomes equal…

Q: Will liquid formaldehyde CH2O dissolve in ethanol CH3CH2OH? Draw a lewis structure for both…

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Q: An azeotrope is, a mixture in which the liquid and vapor phases are at equilibrium with each other…

A: The given statement is- An azeotrope is, a mixture in which the liquid and vapour phases are at…

Q: Boiling point temperature is directly proportional to the volatility of the chemical substance. O…

A: The boiling point temperature of the chemical substance is:

Q: Does it take longer to boil water with salt added to it; if so, why is this?

A: The answer to the following question is- when we boil water the water molecule escape to air in form…

Q: The use of Beer’s law to estimate the concentration of protein samples is limited only to dilute…

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Q: Explain and sketch the Born-Mayer equation to determine the crystallization energy of NaCl and MgCl2

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Q: Discuss the basic thermodynamic concept behind freezing point depression.

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Q: A 21.3 g sample of methyl alcohol (CH3OH) was dissolved in 24 g of water. The molar mass of CH3OH is…

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Q: What was the mass (in g) of the hydrogen peroxide that decomposed?

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Q: What is "?"

A: When ketone reacts with Grignard reagent in presence of water , then reduction of ketone takes…

Q: A generic solid, X, has a molar mass of 82.3 g/mol. In a constant-pressure calorimeter, 46.1 g of X…

A: Given phase change reaction;  X(s) ----->  X(aq) amount of solid X  to be dissolve in water =…

Q: Which statement best describes the differences in the melting temperatures (Tm) of CaO and MgO?

A: Tm(MgO)>Tm(CaO): Stronger ionic forces due to smaller distance between the ions (size) This is…

Q: How do intermolecular forces of attraction define the properties and uses of matter? Using the…

A: 1) Intermolecular forces - Intermolecular forces are the forces which regulates interaction between…

Q: Explain the Solublity Trend of NaF, NaCl, NaBr, NaI in  water?

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Q: A generic solid, X, has a molar mass of 58.9 g/mol. In a constant-pressure calorimeter, 30.9 g of X…

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Q: What is formed when gas is enclosed in a chamber then liquified under very high pressure? * What…

A: Answer-1 When a gas is liquefied in a closed chamber under very high pressure, particles will come…

Q: Is entropy increased or decreased in boiling water?

A: Boiling of water is a process in which the liquid water molecules is given more energy to convert…