For kerosene : Mass of vial and kerosene : 8.62 g Mass of empty vial 5.80 g Mass of chloroform Mass of kerosene Density of kerosene -- %3D Volume of chloroform
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- A solution of acetic acid CH3COOH and water is boiling at 100.4°C . A sample of the vapor above the solution is cooled until it condenses. This condensed sample is analyzed, and turns out to be 10.% acetic acid by mass. Calculate the percent by mass of acetic acid in the boiling solution. Here's some data you may need: normal boiling point density vapor pressure at 100.4°C acetic acid 118.°C 1.1gmL 538.torr water 100.°C 1.00gmL 771.torr Be sure your answer has 2 significant digits. Note for advanced students: you may assume the solution and vapor above it are ideal.Calculate the heat required to bring 10.0 g CCl2F2 from -29.8 °C as a liquid to the gas phase at 10.0 °C. (molar mass = 120.91 g/mol) Cs (gas) = 0.074 kJ/mol·K ΔHvap = 20.1 kJ/mol ΔHfus = 4.14 kJ/molCalculate the heat required to bring 10.0 g CCl2F2 from -29.8°C as a liquid to the gas phase at 10.0°C. (molar mass = 120.91 g/mol) Cs (gas) = 0.074 kJ/mol·K ΔHvap = 20.1 kJ/mol ΔHfus = 4.14 kJ/mol
- Why would industry prefer to purify solids by sublimation or zone refining rather than recrystallization? (Hint: is there anything wasteful about recrystallization)The boiling points, surface tensions, and viscosities ofwater and several alcohols are as shown below:(a) From ethanol to propanol to n-butanol the boilingpoints, surface tensions, and viscosities all increase. Whatis the reason for this increase? (b) How do you explainthe fact that propanol and ethylene glycol have similarmolecular weights (60 versus 62 amu), yet the viscosity ofethylene glycol is more than 10 times larger than propanol?(c) How do you explain the fact that water has thehighest surface tension but the lowest viscosity?The boiling points, surface tensions, and viscosities ofwater and several alcohols are as shown below: (a) From ethanol to propanol to n-butanol the boilingpoints, surface tensions, and viscosities all increase. Whatis the reason for this increase? (b) How do you explainthe fact that propanol and ethylene glycol have similarmolecular weights (60 versus 62 amu), yet the viscosity ofethylene glycol is more than 10 times larger than propanol?(c) How do you explain the fact that water has thehighest surface tension but the lowest viscosity?
- How can solid solution occur between materials?Theoretically, the inherent viscosity for solutions (not pure solvents) should always be a. greater than 0 b. less than 0 c. greater than 1 d. between 0 and 1Phys chem unit 4 . part 1 Kindly properly answer this? thank you so much :) 2. Will water inside a sealed spherical glass boil (see bubble formation?Explain.
- The vapor pressure of 1-chlorotetradecane at several temperatures are tabulated below. T (ºC) P∗ mm Hg 98.5 1 131.8 5 148.2 10 166.2 20 199.8 60 215.5 100 Use your graph in excel to fit the data using the appropriate curve type. Based on a fit of all the data, what is a better estimate for the value of the vapor pressure at 185ºC?A mass m = 0.056 kg of benzene vapor at its boiling point of 80.1 °C is to be condensed by mixing the vapor with Water at 38 °C. What is the minimum mass of water required to condense all of the benzene vapor? Assume that the mixing and condensation take place in a perfectly insulating container.The following information is given for bismuth at 1atm: boiling point = 1627 °C Hvap(1627 °C) = 172 kJ/mol melting point = 271 °C Hfus(271 °C) = 11.0 kJ/mol specific heat solid= 0.126 J/g°C specific heat liquid = 0.151 J/g°C What is H in kJ for the process of freezing a 35.8 g sample of liquid bismuth at its normal melting point of 271 °C.________ kJ