Final answer:
To calculate the vapor pressure of acetone at a given temperature, use the Clausius-Clapeyron equation. For acetone at 25.0 °C, the vapor pressure is approximately 0.193 atm.
Step-by-step explanation:
To calculate the vapor pressure of acetone in a sealed container at a given temperature, you can use the Clausius-Clapeyron equation. The equation is given as ln(P1/P2) = -ΔHvap/R * (1/T1 - 1/T2), where P1 and P2 are the vapor pressures at temperatures T1 and T2 respectively, ΔHvap is the enthalpy of vaporization, R is the gas constant, and T1 and T2 are the temperatures in Kelvin.
In this case, we have the boiling point of acetone (56.5 °C) and the enthalpy of vaporization (31.3 kJ/mol) at the boiling point. To find the vapor pressure at 25.0 °C, we convert the temperatures to Kelvin (56.5+273.15 and 25.0+273.15) and plug the values into the equation to calculate the vapor pressure.
Using the given information, the vapor pressure of acetone at 25.0 °C is approximately 0.193 atm.