The AHfus of gold is 12.55 kJ-mol1, and its ASfus is 9.384 J-mol1.K-. What is the melting point of gold? Т — °С

Q: Which of the following physical processes are exothermicfor water—freezing, boiling, condensing,…

A: Those chemical process which involves absorption of heat are named as endothermic process. However,…

Q: Complete this diagram showing the type of phase change in matter by using the direction the arrows…

A:

Q: strongest intermolecular forces present between molecules in the foll ces:

A: According to the question, we need to determine the strongest intermolecular forces present between…

Q: 3. How much heat is needed to melt 15 g of iron?

A: Given that -  Mass of iron = 15 g  The heat of fusion of iron = 11.7 kJ/mol   And , atomic mass of…

Q: When a substance changes from solid to liquid form, the bonds between the particles become stronger.…

A: State change is the physical change .

Q: The very high melting point and boiling point of ionic compounds such as NaCl is due to the very…

A: • We need to determine which intermolecular force of attraction exist in ionic compounds.

Q: A white substance melts at 70 degrees Celsius. As a solid or in aqueous form it does not conduct…

A: Solids are classified into two types: 1) Crystalline solids 2) Amorphous solids Crystalline solids…

Q: Two different pure solids are melted, and one exhibits a melting point of 138 oC, while the other…

A: Compounds are formed from two or more elements. Compounds are characterized by different chemical…

Q: How is stoichiometry used to calculate energy absorbed when a mass of liquid boils? A. Grams liquid…

A: Given, The stoichiometry used to calculate energy absorbed when a mass of liquid boils is :

Q: You have a solid mixture that contains potassium chloride and lead II sulfate, how would you…

A: Ionic solids are metal salts. They formed when metals form an ionic bond with non-metals. Ionic…

Q: Which of the following is expected to have the highest boiling point CI H .N.

A: Interpretation: We have to tell which of the following has highest boiling point.

Q: Arrange the following compounds in order of increasing melting point. Explain your answers from the…

A: We know that Melting point increases with increasing polarity surface area and packing efficiency of…

Q: 150 135 120 D E 105 90 75 60 B C 45 30A 15 Heat (kJ) Created by E Lee for Virtual Viginia (2021)…

A: In the given heating curve , each region shows a process and state of the substance.  So first we…

Q: Draw an energy diagram, for this phase change: NH3(l) → NH3(g).

A: An energy diagram is drawn by taking Energy on X-axis and Temperature on Y-axis. During phase…

Q: What substance(s) make up the bubbles observed when liquid water boils? H₂O(g) O air O H₂O(l) O H₂ &…

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

Q: Cl2 has A boiling point of -34 Celsius while krypton has a boiling point of -153 Celsius.  why is…

A: Cl2 has A boiling point of -34 Celsius while krypton has a boiling point of -153 Celsius

Q: 7. Melting points of Br2 and ICl are - 7.2 and 27.2°C, respectively and their electrons are same.…

A: Both Br2 and ICl  are isoelectronic, but their melting points are different.

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: Which compound has the highest melting point: NaCl, CH 4, or H 2SO 4?

A: The melting point depends on the strength of intermolecular forces. Higher the intermolecular force,…

Q: Ocean water freezes around -2°C. At what temperature would

A: Given freezing point = -2°C

Q: Which list includes only bulk properties of matter? O kinetic energy, strength of electrical forces,…

A: Given options are : a). Kinetic energy, strength of electrical forces, vapor pressure  b). Boiling…

Q: O triple point O melting point boiling point

A: when the temperature increases then the kinetic energy of the particle increases and when the…

Q: Which portion of this heating curve represents the melting process? B А Heat added O C O E O B O A O…

A: Introduction: The melting process is the process where a substance changes its phase from solid to…

Q: Which of the folowing compounds has the highest and lowest boiling points, respectively? CI CI CI F…

A: A multiple choice question based on introduction to organic chemistry that is to be accomplished.

Q: Q2) If AHº; of H;Oa) is -285.8 kJ/mol and AH°; of H2OR) is -241.8 kJ/mol. then the AH of…

A: Enthalpy of vaporisation(∆H°) : It is the amount of energy that is added to liquid to completely…

Q: Which change happens when a substance melts? O The molecules of the substance move farther apart,…

A: The correct option is as follows:

Q: Of the following, a) melting Ob) sublimation c) condensation. d) boiling 15 dil CAULICHTING e) All…

A:

Q: Formaldehyde is a disinfectant, a preservative, and a raw material for plastics manufacture. Its…

A: Melting point is a temperature at which solid changes to liquid state. Given that melting point of…

Q: Why is this 5. Explain how the melting point of compounds relates to the attractions found in the…

A: Given: Melting point To find: How melting point of compound can tell about the forces of attraction…

Q: - At room temperature, F2 and Cl2 are gases, Br2 is a liquid, and I2 is solid. This is because of…

A: The intermolecular force between the atoms and molecules is known as London dispersion forces.

Q: At 0 deg C , ice has a density of 0.917 g/mL while the density of water is 0.9998 g/mL. The reasons…

A:

Q: What phase of carbon dioxide exists at -120°C at 1 Atm? At 80°C and 100 Atm? Justify your answer.

A:

Q: Describe the features of Ionic Solids?

A: Solids have strong intermolecular space among the atoms, due to the small gap between them. We can…

Q: B. Covalent solids 4. What happens to water molecules when cooled? D. Amorphous Solids A. The water…

A: Since you have posted multiple questions per guidelines we can answer one per session . If you want…

Q: At a constant pressure of 10.0 atm, solid is gradually heated from -80°C to 20°C. Which of the…

A: Option b is correct

Q: Determine if the following substances, drawn above, are polar or nonpolar, explain the reason for…

A:

Q: How much ice in grams would have to melt to lower the temperature of 342 mLmL of water from 35 ∘C∘C…

A: Density of water = 1 g/ml Volume of water = 342 ml Mass of water = Density of water × Volume of…

Q: The melting point of H2O(s) is 0 °C. Would you expect the melting point of H2S(s) to be −85 °C, 0…

A: Given: The melting point of water = 0°C To find: The expected melting point of H2S

Q: 13. Which of the following compounds would be expected to bave the highest melting point? a) NC,…

A: The ionic compounds are held together by electrostatic force ,that is the two oppositely charge ions…

Q: Physical states and phase changes (1) The forces that cause butter to melt on a slice of hot bread…

A:

Q: How much ice in grams would have to melt to lower the temperature of 55.8 g of water from 55°C to…

A: Given mass of water =55.8 g Density of water = 1.0 g/ml

Q: Which phase has a fixed shape? O Solid Gas O Liquid

A: Solid: The atoms/molecules or the constituent are closely packed together and they are not free to…

Q: Water in a well boils at 75°C at a certain depth in water. At what temperature in °C the water will…

A: We know that, Enthalpy of vaporisation of water = 40.5 kJ/mol Water boils at 75°C ( at some pressure…

Q: 80 .D Solid 34 Pressure, bar Liquid 1.013 A Gas 0.13 VB 63 77 122 126 Temperature, K 48. The…

A: In the given question, the mentioned phase diagram explain in detail the behaviour of the substance…

Q: Which of the following substances should have the  highest melting point?     CO     Au     Xe…

A: Any element or molecule melts from solid to liquid at melting point .

Q: What is the dominant force holding the units together in solid carbon dioxide a.Dipolar b.…

A: 1- In this question, we will see that the dominant forces holding by the molecules in solid CO2 (…

Q: Which of the following has the highest boiling point O HCI OHI O HBr O He O CHa

A: Boiling point :-  The temperature at which vapour pressure of liquid becomes equal to atmospheric…

Q: 24. A solid is insoluble in water, does not conduct electricity, and does not melt below 1000°C.…

A: Inorganic chemistry:

Q: The heat of vaporization of mercury is 296 J/g and the vapor pressure of mercury at 25.0°C is 2.56 ×…

A: Given,Heat of vaporization of mercury = 296J/g.Vapor pressure of mercury = 2.56*10-3torr.Volume of…