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- 3. (a) The Lattice enthalpy for the solid ionic compound AgBr is +900. kJ/mole. Write the chemical equation that corresponds to the Lattice Enthalpy for AgBr(s) in the space above. Then explain in your own words why this is a large positive number. (b) The hydration enthalpy for AgBris -821 kJ/mole. Write the chemical equation that corresponds to the Hydration Enthalpy for AgBr(s) in the space above. Then explain in your own words why this is a large negative number. (c) Would you expect this compound to be soluble in water? Why/Why not? Calculate anything you need in order to figure this out, and explain your answer.2. All liquids have characteristic vapor pressure that vary with temperature. The characteristic vapor pressure for pure water at 22°C is 19.827 mm Hg and at 30.0°C is 31.824 mm Hg. Use these data to calculate the change in enthalphy per mole for the vaporizationWrite the ions present in solution of Sn(NO2)4.Express your answers as chemical formulas separated by a comma (NO spaces!).Identify all of the phases in your answer (e.g. NO3-(aq),Cu2+(aq) ) ---------- Write the ions present in solution of NaHCO3.Express your answers as chemical formulas separated by a comma (NO spaces!).Identify all of the phases in your answer (e.g. NO3-(aq),Cu2+(aq) ) ---------- Even salts that are classified as "insoluble" according to the solubility rules will dissolve a small amount in water. Write the ions present in solution of CaSO4.Express your answers as chemical formulas separated by a comma (NO spaces!).Identify all of the phases in your answer (e.g. NO3-(aq),Cu2+(aq) )
- 3. (a) The Lattice enthalpy for the solid ionic compound AgBr is +900. kJ/mole. Write the chemical equation that corresponds to the Lattice Enthalpy for AgBr(s) in the space above. Then explain in your own words why this is a large positive number. (b) The hydration enthalpy for AgBr is -821 kJ/mole. Write the chemical equation that corresponds to the Hydration Enthalpy for AgBr(s) in the space above. Then explain in your own words why this is a large negative number.…Calculate the change in the chemical potential of liquid water and water vapor when the pressure is increased from 1.0 atm to 10 atm at 100°C. Discuss the effect of the pressure increase on the equilibrium between the liquid water and the water vapor. Assume that water vapor behaves perfectly and the density of water is 1 g/cm3.The normal boiling point of benzene is 80.10 °C. At 25.00 °C, the vapour pressure of benzene is 0.1253 atm. What is the vapour pressure of benzene when the temperature is 49.00 °C?
- Barium titanate (BaTiO3) is an ionic solid with a density of 6.02 g/cm3. Its structure is described by orthogonal basis vectors (i.e. at 90 degrees to each other) with lattice parameters of a = b = 0.3992 nm and c = 0.4036 nm.a) What crystal system does barium titanate belong to, based on the above information?Explain your answer. b) Find the number of Ba, O, and Ti atoms per cubic centimeter in barium titanate (i.e.provide a value for each element). c) Sketch and label the (111) plane of BaTiO3 with its atoms and dimensions.Calculate the cryoscopic and ebullioscopic constants for liquid bromine, Br2. You will need the following data: 8.89 K/molal (Kf); 4.95 K/molal (Kb)ΔfusH: 10.57 kJ/mol; MP: 27.2°CΔvapH: 29.56 kJ/mol; BP: 58.78°CIsooctane (2,2,4-trimethylpentane) has an octane rating of 100. It is used as one of the standards for the octane-rating system for gasoline. At 34.0 °C, the vapor pressure of isooctane is 10.0 kPa, and at 98.8 °C, its vapor pressure is 100.0 kPa. Use this information to estimate the enthalpy of vaporization for isooctane.
- The normal boiling point of cyclohexane is 80.74 °C.At 20.00 °C, the vapour pressure of cyclohexane is 0.1026 atm.What is the vapour pressure of cyclohexane when the temperature is 33.00 °C?2. Refer to the phase diagram depicted below: if a sample is made by mixing 3 moles of A and 7 moles of B at 50oC, identify the phases exist in the system: one phase: vapor one phase: liquid two phases: vapor and liquid two phases: two liquidIn the Dumas method for determining the molar mass of an unknown volatile liquid, a sample of a volatile liquid that boils below 100oC is vaporized in a boiling water bath and the mass of the vapor required to fill the flask is determined. The following data was collected: Flask Volume 100.0 + 100.0 + 79.6 mL = 279.6 mL Mass of Flask + Cap 143.85 g Mass of Flask + Condensed Liquid 144.95 g Mass of Condensed Liquid 1.10 g Temperature of Water Bath (oC) 84.1 oC Barometric Pressure (atm) 0.985 atm What is the molar mass of the unknown? What will its temperature be when the pressure is 1.20 atm and the volume is 250.0 mL?
