Question

In: Chemistry

Ethanol boils at 73.30 degrees Celsius at atmospheric pressure. The heat of vaporization, ΔΗvapis 39.3 kJ/mol....

Ethanol boils at 73.30 degrees Celsius at atmospheric pressure. The heat of vaporization, ΔΗvapis 39.3 kJ/mol. The melting point at atmospheric pressure is -114.10 degrees Celsius. The triple point is at pressure 0.00043 Pa and temperature -123.00 degrees Celsius. The density of liquid Ethanol at 25.0 degrees Celsius is 0.783 gr/cm3.

  1. What is the vapor pressure of liquid ethanol at 30.00 degrees Celsius?
  2. The heat of fusionΔΗmeltis 4.9 kJ/mol. Calculate the change in volume brought about by a transition from the liquid phase to the solid phase at 300 K. Assume that the coexistence curve solid-liquid is a straight line with a constant slope along its entire trajectory. Is the result logical?
  3. Draw the phase diagram, including the points referred to in the question.

Solutions

Expert Solution

a) As per phase diagram of ethanol shown below, the vapour pressure of liquid ethanol at 30 Degree Celsius is 0 bara; as there is no vapours of ethanol formed at the given temperature.

queen_honey_blossom answered 2 years 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?
Pure liquid water has a heat of vaporization of ­x kJ/mol. The vapor pressure of water...
Pure liquid water has a heat of vaporization of ­x kJ/mol. The vapor pressure of water is 23.756 torr at room temperature (25 °C). What would the vapor pressure of water be expected to be at 37 °C? How would the vapor pressure be changed if 1.0 gram of NaCl were added to a volume of 100 mL of water?
Ammonia (NH3) boils at -33.4 oC. It has an enthalpy of vaporization of 23.35 kJ/mol. The...
Ammonia (NH3) boils at -33.4 oC. It has an enthalpy of vaporization of 23.35 kJ/mol. The liquid has a specific heat of 80.8 J/mol oC, and the gas has a specific heat of 35.06 J/mol 0C. A 34.06 gram sample of ammonia was heated, at 1 atmosphere pressure, from -40 oC to room temperature (25 oC). How many kJ of thermal energy did the sample absorb from the surroundings in this process? I got 101263.8J (101.3kJ) and it is NOT...
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
A volatile liquid has an enthalpy of vaporization of 31.6 kJ/mol, and a vapor pressure of...
A volatile liquid has an enthalpy of vaporization of 31.6 kJ/mol, and a vapor pressure of 224 mmHg at a temperature of 25.0 oC. What is the normal boiling point of the liquid?
250 gallons of water (at 25 degrees Celsius and 1 atmospheric pressure) are boiled to power...
250 gallons of water (at 25 degrees Celsius and 1 atmospheric pressure) are boiled to power a steam engine. The heat source to boil the water is the combustion of methanol according the the reaction below. 2 CH3OH (liters) + 3 O2 (grams) −→ 2 CO2 (grams) + 4 H2O (liters) Using the enthalpy of the combustion of methanol (at 25 degrees Celsius and 1 atmospheric pressure), how many liters of methanol are required to boil the 250 gallons of...
A certain substance has a heat of vaporization of 70.78 kJ/mol. At what Kelvin temperature will...
A certain substance has a heat of vaporization of 70.78 kJ/mol. At what Kelvin temperature will the vapor pressure be 6.50 times higher than it was at 331 K?
A certain substance has a heat of vaporization of 62.41 kJ/mol. At what Kelvin temperature will...
A certain substance has a heat of vaporization of 62.41 kJ/mol. At what Kelvin temperature will the vapor pressure be 5.00 times higher than it was at 317 K?
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?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT