# Chemistry

posted by .

The boiling point of ethanol is 78.5C and delta H vap = 40.5kJ/mol. Calculate the vapor pressure (in torr) of ethanol at 0.0C ?

• Chemistry -

I know that I am close to the answer using this formula with plugged in information:
ln p2/760= 40500/8.314(1/273-1/351.1)
Just not sure what I am doing wrong. Is someone could assist me that would be greatly appreciated! thanks :)

• Chemistry -

I didn't go through it but it appears to me you didn't convert T2 properly.
273.15 + 78.5 = 351.65. Try that. If it doesn't work let me know and I'll go through the math. BUT if would help if you posted you work and I looked for the error. It's better that way.

## Similar Questions

1. ### Chemistry

A 15.0g sample of liquid ethanol, C2H5OH, absorbs 5.13x10^3 J of heat at its normal boiling point, 78.0C. The molar enthalpy of vaporization of ethanol is 39.3kJ/mol. (a) What volume of ethanol vapor is produced?
2. ### Chem

The boiling point of ethanol is 78.5C and delta H vap = 40.5kJ/mol. Calculate the vapor pressure (in torr) of ethanol at 0.0C ?
3. ### Chemistry

How much energy (in kilojoules) is released when 26.5g of ethanol vapor at 86.0C is cooled to -12.0C?
4. ### chem

A 4.1 L sealed bottle containing 0.25 g of liquid ethanol, C2H6O, is placed in a refrigerator and reaches equilibrium with its vapor at -11°C. The vapor pressure of ethanol is 10 torr at -2.3°C and 40 torr at 19°C. (a) What mass …
5. ### Chemistry

The normal boiling point of ethanol is 78.4°C. When 9.16 g of a soluble nonelectrolyte was dissolved in 100. g of ethanol, the vapor pressure of the solution at that temperature was 7.40 102 Torr. (a) What are the mole fractions of …
6. ### College Chemistry

1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.) Boiling point …
7. ### College Chemistry

1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.) Boiling point …
8. ### College Chemistry

1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.) Boiling point …
9. ### chemistry

Calculate the ÄHvap , in kJ/mol, for ethanol, given that the vapor pressure at 45.0°C is 155.0 torr. The normal boiling point of ethanol is 78°C. Express your answer to two decimal places.
10. ### chemistry

Ethanol has an enthalpy of evaporation of 38.6kJ/mol, and a normal boiling point of 78.4oC. What is the vapor pressure of ethanol at 15oC?

More Similar Questions