The reason for not using more than 6 qt of antifreeze for the maximum protection against the freezing needs to be explained. Concept introduction: The use of water is limited to the temperature range 0 0 C − 100 0 C , because it exists as a liquid in this temperature range. We can expand this range by adding a non-volatile solute to water. Non-volatile solute causes freezing point depression and boiling point elevation. The most common application of this phenomenon is using an antifreeze like ethylene glycol in water in automobile radiator. Ethylene glycol prevents water from freezing at very cold weather and prevents water from vaporizing and generating enough pressure to explode at very high temperatures.
The reason for not using more than 6 qt of antifreeze for the maximum protection against the freezing needs to be explained. Concept introduction: The use of water is limited to the temperature range 0 0 C − 100 0 C , because it exists as a liquid in this temperature range. We can expand this range by adding a non-volatile solute to water. Non-volatile solute causes freezing point depression and boiling point elevation. The most common application of this phenomenon is using an antifreeze like ethylene glycol in water in automobile radiator. Ethylene glycol prevents water from freezing at very cold weather and prevents water from vaporizing and generating enough pressure to explode at very high temperatures.
Solution Summary: The author explains the reason for not using more than 6 qt of antifreeze for the maximum protection against freezing needs to be explained.
The reason for not using more than 6 qt of antifreeze for the maximum protection against the freezing needs to be explained.
Concept introduction:
The use of water is limited to the temperature range 00C−1000C, because it exists as a liquid in this temperature range. We can expand this range by adding a non-volatile solute to water. Non-volatile solute causes freezing point depression and boiling point elevation. The most common application of this phenomenon is using an antifreeze like ethylene glycol in water in automobile radiator. Ethylene glycol prevents water from freezing at very cold weather and prevents water from vaporizing and generating enough pressure to explode at very high temperatures.
In benzene, dimerization occurs with benzene due to hydrogen bonding. In 110 g of benzene, 1.70g of acetic acid is dissolved that increases the boiling point by 0.40 oC. What is the expected degree of association of acetic acid? (Use Kb=2.57 Kg mol-1 )?
(a) Temperature dependence of the vapor pressure of ethylene log p (mm Hg) = - 834.13 / T + 1.75 log T - 8.375 x 10-3 T + 5.3234 , which gives the temperature dependence of the molar enthalpy of vaporization derive the equation.
(b) Calculate the molar enthalpy of evaporation at -103.9 oC, the normal boiling point of ethylene. Note: Use the equation that gives the temperature dependence of ΔHvap= a + bT + cT2+ ….enthalpy.
2.) Determine the freezing point of benzene (78.11 g/mol) at 100 atm if the normal freezing point is
5.5°C, the enthalpy of fusion for benzene is 9.937 kJ/mol. Assume that the enthalpy is independent
of the temperature. The densities of solid and liquid benzene are 1.012 g/cm3 and 0.879 g/cm3.
A. 282°C
B. 8.2°C
C. 278.68°C
D.) 5.5 °C
E. 5.6°C
Chapter 14 Solutions
General Chemistry: Principles and Modern Applications (11th Edition)
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell