An unknown compound gave a melting point of 230°C. When the molten liquid solidified, the melting point was redetermined and found to be 131°C. Give a possible explanation for this discrepancy.

Q: a. This substance can be liquified by compression at room temperature. b. At any point on the curve…

A: Phase diagram:

Q: 13. At what temperature and pressure do all three phases coexist? 14. At a constant temperature,…

A: 13) At first we need to know what is triple point. At particular temperature and pressure when three…

Q: How can the gaseous water be converted back to a liquid on thewalls of a condenser?

A: Condensation is the process of conversion of water in its gaseous state (water vapor) into liquid…

Q: 36. Which of these substances has the highest boiling point? (Hint: You likely don't know the answer…

A: Types of intermolecular forces are, London dispersion forces Dipole–dipole interactions Ion–dipole…

Q: What is the normal freezing point, melting point, and boiling point of the substance

A: Matter generally exists in 3 different forms, namely solid, liquid and gas. The three states…

Q: This graph shows how the vapor pressure of three liquids varies with temperature: 900 800 700 600…

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Q: The pressure above a pure sample of solid Substance X at – 184. °C is raised. At what pressure willl…

A: Physical state of a substance under different conditions of pressure and temperature is represented…

Q: This graph shows how the vapor pressure of three liquids varies with temperature: 900 800 700 600…

A:

Q: Heat was added to 25g of solid sodium chloride, NaCl(s), at the rate of 3.00kj/min. The temperature…

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Q: What would be the possible application of determining the melting point of a substance?

A: Below attached file showing the details answer.  All the best.

Q: Roughly draw the phase diagram of a pure compound and predict the solid-liquid-gas states, including…

A: Solid, liquid, and gaseous phases of a substance are related to each other, and the graph shows the…

Q: What is the melting point of the substance modeled by this heating curve? F. 150 135 120 D 105 90 75…

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Q: Illustrate the phase diagram of acetone and explain your findings.

A: Phase diagram of any system is the diagram which describes the change in the physical state of that…

Q: 12. Two charged spheres 10 cm apart attract each other with a force of 3.0 x 10-6N. What force…

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Q: 28)Which has the highest melting point MgO H2O CH3CH2CH3 Ar

A: The temperature at which solid form is converted to   liquid form is known as melting point.

Q: What are the methods for determining the degree of melting

A: The melting point of any substance is defined as it is the particular temperature at which the…

Q: The pressure above a pure sample of solid Substance X at – 130. °C is lowered. At what pressure will…

A: For any solid to start melting, the pressure and temperature of the substance should be such that…

Q: Define the terms boiling point and normal boiling point.

A: To define: Boiling point Normal boiling point The vapor pressure of a liquid is the equilibrium…

Q: This graph shows how the vapor pressure of three liquids varies with temperature: 900 - 800 700- 600…

A: Volatility of a liquid is how easily any liquid vaporizes at a certain temperature. So at same…

Q: Use the change of state interactive to answer the questions. Using the phase change graph, identify…

A: Answer:- This question is answered by using the given heating curve which shows the melting and the…

Q: Ethylene glycol is used in antifreeze.  What is the vapor pressure of ethylene glycol at 100 oC in…

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Q: The boiling point of acetic acid is usually stated to be 118°C. Is it possible to have acetic acid…

A: The liquid state of any substance is changed to its vapor state, when the atmospheric pressure…

Q: i) ii) Magnesium has Silicon has a very high melting tempé Sulphur has a higher melting temperature…

A: The question is based on periodic properties of the elements. We have to compare the melting point…

Q: The boiling point of acetic acid is usually stated to be 118oC. Is it possible to have acetic acid…

A: Yes, all we have to do lower the air pressure and we can depressed the boking point of any liquid.

Q: substance melts sharply at 135°C. Is it a pure compound? Explain.

A: If any substance has range of temperature of melting point that meansthat substance have some…

Q: The heat of fusion of some component A at it normal melting point 242 K is 3.62 cal/g. The densities…

A: The relation between heat of fusion and pressure is shown below: P2 -P1 =∆Hfusion∆VfusionlnT2T1…

Q: List the following compounds in the order of increasing melting points.  LiF, NaCl, CaO Justify your…

A: A question based on melting point, which is to be accomplished.

Q: A substance melts sharply at 135°C. Is it a pure compound?

A: Substances that melt sharply at a particular temperature are pure substances.  Substances melt at a…

Q: 1.In what phase is the substance at 50 °C and 1 atm pressure?2.At what pressure and temperature…

A: All things are provided in handwritten solution.

Q: 1. What section represents the sold phase? 2. What section represents the liquid phase? 3. What…

A: Phase Diagram The graph that relates Pressure and temperature to the state of matter. On x-axis,…

Q: 4. What would you do to cause a substance to change from a solid phase to a liquid phase at constant…

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Q: What is the melting point of the substance modeled by this heating curve? F. 150 135 120 D E 105 90…

A: Given:-

Q: (a) Neat diethylzinc, Et2Zn, is a liquid with a melting point of -28°C while EtZnBr, EtLi, and Et2Mg…

A: Diethyl zinc is a highly reactive liquid and is flammable in air or water. It should be handled in…

Q: match the following    0.110 m CoI2      A. Highest boiling point     0.180 m NaCH3COO   B. Second…

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Q: 32) Which of the following solids has the lowest melting point? Ne CH4 CCl4 H2O

A: Given solids,    Ne    CH4    CCl4    H2O

Q: In the determination of melting points, oil bath are always preferred to water baths. why?

A: Oils like paraffin liquids are used in oil bath for melting point determination instead of heating…

Q: Q1/Why do we use oil instead of water to determine the melting point of chemicals? Q2/What is the…

A: Melting point is defined as the temperature at which the compound undergoes a phase change from…

Q: What is the triple point?

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Q: Illustrate the phase diagram of ethyl alcohol and explain the findings.

A: Phase equilibria is based on Gibb’s Phase rule in which the number of degrees of freedom is given by…

Q: On a pure substance, taking into acceunt the information given below, it reasonably explains: Triple…

A: The nature of a substance existing in a particular phase depends on the temperature and pressure of…

Q: What steps can you take to determine the melting point of a substance that sublimes before it melts?

A: Sublimation is a process in which the solid is directly converted into vapour state without…

Q: Discuss elevation of boiling point in detail

A: Boiling point: It is the physical parameter that is, the temperature at which the liquid substances…

Q: 9)Who measures melting points?

A: Melting point is defined as the temperature at which solid starts melting. At melting point there is…

Q: Illustrate the phase diagram of ethyl alcohol and explain your findings.

A: Ethanol is a liquid at standard conditions. However, at low temperature and/or very high pressures…

Q: This graph shows how the vapor pressure of three liquids varies with temperature: 900- 800- 700 600…

A:

Q: A student obtained a solid product in a laboratory synthesis. To verify the identity of the solid,…

A: The temperature at which a solid substance maintains an equilibrium with its liquid phase is known…

Q: This graph shows how the vapor pressure of three liquids varies with temperature: 900 800 700 600…

A:

Q: According to this phase diagram, the normal boiling point of the substance in degree Celsius is:…

A: The boiling point is the point in the phase diagram at 1 atm pressure.