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Which has higher vapor pressure methanol or ethanol?
Methanol has the higher vapor pressure because its molecules are smaller than those of ethanol, and so its intermolecular forces are less than ethanol’s. Methanol has the higher vapor pressure because its molecular weight is less than ethanol and so its intermolecular forces are less than ethanol’s.
Which liquid has the highest vapor pressure?
methyl chloride
For example, at any given temperature, methyl chloride has the highest vapor pressure of any of the liquids in the chart.
Which substance has the highest vapor pressure at room temperature?
When comparing vapor pressures we need to be making comparisons at the same temperature. Thus at room temperature, the substance with the lowest boiling point will have the highest vapor pressure (easiest to get into the gas phase). The substance with the highest boiling point will have the lowest vapor pressure.
What is the vapor pressure of methanol and ethanol?
Volatile solutes The partial pressures, Pa and Pb, are determined using Raoult’s Law. So, for example, methanol has a vapor pressure of 94 torr at 25 °C, and ethanol has a vapor pressure of 44 torr at 25 °C.
What is the vapor pressure of ethanol at 60 C?
The vapor pressure of pure ethanol at 60 degrees C is 349 mmHg.
At which temperature is the vapor pressure of ethanol?
Note that the pressure can be in any units, so long as they agree for both P values, but the temperature must be in kelvin for the Clausius-Clapeyron equation to be valid. At 20.0 °C, the vapor pressure of ethanol is 5.95 kPa, and at 63.5 °C, its vapor pressure is 53.3 kPa.
Which liquid has the lowest vapor pressure at 75 C?
Hence, Ethanoic acid is the substance which has the lowest vapor pressure.
Which liquid has the lowest vapor pressure at 65c?
Explanation: The liquid that has the lowest vapor pressure at 65.0 °C is ethanoic acid.
What is the critical pressure of ethanol?
6.390 MPa
ETHANOL
| Molecular weight: 46.1 | Critical temperature: 516.25 K |
|---|---|
| Melting point: 158.65 K | Critical pressure: 6.390 MPa |
| Normal boiling point: 351.45 K | Critical density: 280 kg/m3 |
At which temperature is the vapor pressure of ethanol equal to 80?
Answer: 73 °C.