Question

The normal boiling point of ethanol is 78.3 ∘C, and the heat of vaporization is ΔHvap = 38.6 kJ/mol.

Part A

What is the boiling point of ethanol in ∘C on top of Pikes Peak in Colorado, where P = 401 mmHg?

Express your answer with the appropriate units.

Answer #1

*Part A:*

*Given data ,*

*P2 = 401 mmHg*

*T1 = 78.3 ^{0} C + 273 = 351.3 K*

*P1 = 1 atm = 760 mmHg*

*H _{vap}
= 38.6 kJ / mol = 38600 J/ mol*

*Let us consider a Clausius - Claperyon equation*

*ln(P2 / P1) = (-H _{vap}
/ R) x (1 / T2 - 1 / T1)*

*ln (401 / 760) =( -38600 / 8.314) x (1 / T2 - 1 / 351.3
)*

*- 0.6462 = - 4642.77 x (1 / T2 - 1 /
351.3 )*

*0.0001391 = (1 / T2 - 1 / 351.3 )*

*0.0001391 = 1 / T2 - 0.0028465*

*0.0029856 = 1 / T2*

*T2 = 335 K - 273*

*= 62^{0} C*

*Therefore the new boiling point is 62 ^{0} C*

Propane has a normal boiling point of −42.0∘C and a heat of
vaporization (ΔHvap) of 19.04 kJ/mol. What is the vapor
pressure of propane at 20.0 ∘C?
Express the pressure in torrs to three significant
figures.

Propane has a normal boiling point of -42.0 ∘C and a heat of
vaporization (ΔHvap) of 19.04 kJ/mol. What is the vapor pressure of
propane at 40.0 ∘C

Propane has a normal boiling point of -42.0 ∘C and a heat of
vaporization (ΔHvap) of 19.04 kJ/mol. What is the vapor
pressure of propane at 40.0 ∘C?

the molar heat of vaporization of ethanol is 39.3
kj/mol and the boiling point of ethanol is 78.3 celcius calculate
delta s for the vaporization of 0.60 mol of ethanol

The heat of vaporization of water at its normal boiling point is
ΔHvap = 40.656 kJ/mol. Estimate the vapor pressure of water at
25°C. Answer in atm.

The normal boiling point of liquid ethanol is
351 K. Assuming that its molar heat of
vaporization is constant at 45.1 kJ/mol, the
boiling point of C2H5OH when
the external pressure is 0.602 atm is ? K.

The normal boiling point of ethanol is 78.3oC. Assuming an
average molar enthalpy of vaporization value of 40.0 kJ/mol in the
temperature interval between 20.0oC and the normal boiling point,
calculate the vapor pressure of ethanol at 30.0oC.

Acetic acid has a normal boiling point of 118 ∘C and a ΔHvap of
23.4 kJ/mol.What is the vapor pressure (in mmHg) of acetic acid at
40 ∘C? Express your answer using three significant figures.

The
normal boiling point of ethanol is 78c and has an enthaply of
vaporization value of 38.9 kJ/mol. What value must the pressure be
if we want to boil ethanol at 25c in a vacuum distillation?
Change temperature to kelvin

What is the vapor pressure of ethanol at 16 ∘C?
Ethanol has a heat of vaporization of 38.56kJ/mol and a normal
boiling point of 78.4 ∘C.
Answer in torr please
Thanks!

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 52 seconds ago

asked 18 minutes ago

asked 36 minutes ago

asked 41 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago