Ethanol has a heat of vaporization of 38.56kJ/mol and a normal boiling point of 78.4 ℃

Ethanol has a heat of vaporization of 38.56kJ/mol and a normal boiling point of 78.4 ℃ .

What is the vapor pressure of ethanol at 17 ℃?

Express your answer using two significant figures. Units in torr

Solutions

Expert Solution

logP2/P1 = Hv/2.303R [1/T1 -1/T2]

T1 = 17⁰C = 17 + 273 = 290K

T2 = 78.4⁰C = 78.4 + 273 = 351.4K

P1 =

P2 = 760torr

Hv = 38.56Kj/mole = 38560J/mole

logP2/P1 = Hv/2.303R [1/T1 -1/T2]

log760/P1 = 38560/2.303*8.314 [1/290 -1/351.4]

= 2013.87(0.003448-0.00284)

= 1.2244

log760/P1 = 1.2244

760/P1 = 10^1.2244

760/p1 = 16.7648

P1 = 760/16.7648 = 45.33 torr >>>>answer or 43 torr

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

Ethanol has a heat of vaporization of 38.56 kJ/mol and a normal boiling point of 78.4...

Ethanol has a heat of vaporization of 38.56 kJ/mol and a normal boiling point of 78.4 ∘C. What is the vapor pressure of ethanol at 12 ∘C?

Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of...

Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 ∘C. A 250 mL sealed flask contains 0.65 g of butane at −22∘C. How much butane is present as a liquid at the boiling point? If the butane is warmed to 25 ∘C, how much is present as a liquid?

Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of...

Butane (C4H10) has a heat of vaporization of 22.44 kJ/mol and a normal boiling point of -0.4 ∘C. A 250 mL sealed flask contains 0.6 g of butane at −22∘C. How much butane is present as a liquid at the boiling point? If the butane is warmed to 25 ∘C, how much is present as a liquid?

A) methanol has a normal boiling point of 64.6°C and a heat of vaporization H of...

A) methanol has a normal boiling point of 64.6°C and a heat of vaporization H of 35.2 kJ/mol. What is the vapor pressure of methanol at 12.0°C B) How much energy in kJ is needed to heat 5.00 g of ice from -10.0°C to 30.0°C? the heat of fusion of water is 6.02 kJ/mol, and the molar heat capacity is 36.6 J/mol K for ice and 75.3 J/mol K for liquid water

The normal boiling point of ethanol, C2H5OH, is 78.3 °C, and its molar enthalpy of vaporization...

The normal boiling point of ethanol, C2H5OH, is 78.3 °C, and its molar enthalpy of vaporization is 38.56 kJ/mol. What is the change in entropy in the system when 68.3 g of C2H5OH(g)2at 1 atm condenses to liquid at the normal boiling point?

Water has an unusually high specific heat, melting point, boiling point, and heat of vaporization as...

Water has an unusually high specific heat, melting point, boiling point, and heat of vaporization as compared to compounds of similar molar mass. Explain why. Please show all work with the correct answer. Thank you!!!!

Ethanol has a normal boiling point of 78.3 degrees celcius. Why is the normal boiling point...

Ethanol has a normal boiling point of 78.3 degrees celcius. Why is the normal boiling point higher than methanol but lower than iso-propanol (Normal boiling point = 82.3, heat of vaporization = 45.4)? Would you expect the heat of vaporization of ethanol to follow the same trend? Explain. AND Calculate the heat of vaporixation of cyclohexane using the normal boiling point of 80.7 degrees celcius. The vapor pressure of cyclohexane at 25.0 degrees celcius is 0.132 atm.

Estimate the heat of vaporization of diethyl ether at its normal boiling point using Trouton’s rule...

Estimate the heat of vaporization of diethyl ether at its normal boiling point using Trouton’s rule and Chen’s rule and compare the results with a tabulated value of this quantity. Calculate the percentage error that results from using each estimation. Then estimate ΔH^v at 100°C using Watson’s correlation.

The standard enthalpy of vaporization of Freon-11, CFCl3, is 25.21 kJ/mol at its normal boiling point...

The standard enthalpy of vaporization of Freon-11, CFCl3, is 25.21 kJ/mol at its normal boiling point of 17°C. What is the change of entropy for 1 mol of liquid Freon-11 when it vaporizes at its normal boiling point? For the process Cl2(g) → 2Cl(g), Question 18 options: ΔH is + and ΔS is + for the reaction. ΔH is + and ΔS = 0 for the reaction. ΔH is – and ΔS is – for the reaction. ΔH is –...

The normal boiling point of methanol is 64.7°C and the molar enthalpy of vaporization if 71.8...

The normal boiling point of methanol is 64.7°C and the molar enthalpy of vaporization if 71.8 kJ/mol. The value of DS when 2.15 mol of CH3OH(1) vaporizes at 64.7°C is __________J/K. A. 0.457 B. 2.39 C. 5.21 x 107 D. 457 E. 2.39 x 103

Subjects