A solution of pentane and ethanol CH3CH2OH that is 50.% pentane by mass is boiling at...

A solution of pentane and ethanol CH3CH2OH that is 50.% pentane by mass is boiling at 57.2°C. The vapor is collected and cooled until it condenses to form a new solution.

Calculate the percent by mass of pentane in the new solution. Here's some data you may need:

	normal boiling point	density	vapor pressure at 57.2°C
pentane	36.°C	0.63gmL	1439.torr
ethanol	78.°C	0.79gmL	326.torr

Be sure your answer has the correct number of significant digits.

Note for advanced students: you may assume the solution and vapor above it are ideal.

Expert Solution

Here is the Solution:

Thanks! :-)

queen_honey_blossom answered 2 years ago

A solution of ethanol CH3CH2OH and water that is 10.% ethanol by mass is boiling at...

A solution of ethanol CH3CH2OH and water that is 10.% ethanol by mass is boiling at 98.7°C. The vapor is collected and cooled until it condenses to form a new solution. Calculate the percent by mass of ethanol in the new solution. Here's some data you may need: normal boiling point density vapor pressure at 98.7°C ethanol 78.°C 0.79gmL 1563.torr water 100.°C 1.00gmL 725.torr Be sure your answer has the correct number of significant digits. Note for advanced students: you...

The boiling point of ethanol CH3CH2OH is 78.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves...

The boiling point of ethanol CH3CH2OH is 78.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in ethanol is estrogen (estradiol). How many grams of estrogen, C18H24O2 (272.4 g/mol), must be dissolved in 265.0 grams of ethanol to raise the boiling point by 0.500 °C ? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl...

a solution is prepared by mixing equal masses of methanol, ch3oh, and ethanol, ch3ch2oh what is...

a solution is prepared by mixing equal masses of methanol, ch3oh, and ethanol, ch3ch2oh what is the mole fraction of each component in the mixture

A solution is made up of 184 g of ethanol, CH3CH2OH, and 108 g of water....

A solution is made up of 184 g of ethanol, CH3CH2OH, and 108 g of water. If the volume of the solution is 334 cm3 and the partial molar volume of water is 17 cm3 mol-1 , what is the partial molar volume of ethanol under these conditions?

Given the following: CH3CH2OH + NH3 -- CH3CH2O- + NH4+ pka of Ethanol = 15.9. A)...

Given the following: CH3CH2OH + NH3 -- CH3CH2O- + NH4+ pka of Ethanol = 15.9. A) Calculate the Keq for the acid-base reaction. B) Explain different result between reactions of ammonia with acetic adis, and with ethanol.

Calculate the molarity and molality of a solution of 50 grams of ethanol, C2H5OH (density =...

Calculate the molarity and molality of a solution of 50 grams of ethanol, C2H5OH (density = 0.789 g/mL) which is dissolved in 200 mL of water (density = 1.00 g/mL). Please show all work with the correct answer. Thank you!!!

What is the freezing point of a 50% by volume ethanol solution? Assume water is the...

What is the freezing point of a 50% by volume ethanol solution? Assume water is the solvent. (Use data from Table 12.7 in the textbook.) Solvent Normal Freezing Point (°C) Kf (°C m−1) Normal Boiling Point (°C) Kb (°C m−1) Benzene (C6H6) 5.5 5.12 80.1 2.53 Carbon tetrachloride (CCl4) −22.9 29.9 76.7 5.03 Chloroform (CHCl3) −63.5 4.70 61.2 3.63 Ethanol (C2H5OH) −114.1 1.99 78.3 1.22 Diethyl ether (C4H10O) −116.3 1.79 34.6 2.02 Water (H2O) 0.00 1.86 100.0 0.512 For water:...

Context: Performed boiling point elevation lab to determine molar mass of solute dissolved in pure ethanol...

Context: Performed boiling point elevation lab to determine molar mass of solute dissolved in pure ethanol (solute was urea): Question: In regards to intermolecular forces, why is is the assumption that the solute is a nonelectrolyte valid here? What types of intermolecular fires are present in the solvent? For what types of solutes and in which solvent would the van't Hoff factor be larger than 1? The only one that I think I know is the last part - electrolytes...

The vapor pressure of ethanol (CH3CH2OH) at 20c is 44 mm Hg, and the vapor pressure...

The vapor pressure of ethanol (CH3CH2OH) at 20c is 44 mm Hg, and the vapor pressure of Methanol (CH3OH) at the same temperature is 94 mm Hg. A mixture of 30.0 g of Methanol and 45.0 g ethanol is prepared and can be assumed to behave ideally. Anwser the following questions concerning this mixture. A) Which component is more volatile? A2) Determine the mole fraction of both components of the liquid mixture? B) Calculate the vapor pressure of methanol and...

Ethanol (CH3CH2OH) can be produced from sugars and starches in crops such as corn or sugarcane....

Ethanol (CH3CH2OH) can be produced from sugars and starches in crops such as corn or sugarcane. Ethanol is used as a gasoline additive and when completely burned, it combines with oxygen to form CO2 and H2O. Write the balanced equation for the complete combustion reaction and calculate the net energy change per mole of ethanol. Bond Energy C – H → 416 kJ/mol O – H → 467 kJ/mol C – C → 356 kJ/mol C – O → 336...

Question