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The following experiment is conducted to measure the Henry's law constant of chloroform (CHCL_3). A vessel with a volume of 2 L is half filled with water and then sealed, so it contains 1 L of water and 1 L of air. One gram of liquid chloroform is injected into the water through a rubber septum. The contents are thoroughly mixed and then allowed to equilibrate. A sample of gas is extracted from the air space above the water. Using a gas chromatograph, it is determined that the mass concentration of the chloroform in air is 89 mg/L. Determine the value of the Henry's Law constant in units of M atm.
Use the data below to answer the questions. Substance Delta HF kJ/mol) C(g) 718.4 CF_4(g) -679.9 CH_4(g) -74.8 H(g) 217.94 HF(g) -268.61 Keep in mind that the enthalpy of formation of an element in its standard state is zero
If 0.420 mol of a nonvolatile nonelectrolyte are dissolved in 3.20 mol of water, what is the vapor pressure P_{\rm H_2O} of the resulting solution? The vapor pressure of pure water is 23.8 \rm torr at 25 \rm{^\circ}C.
What is the pH of a solution that is 6.5×10-2M in potassium propionate and 8.5×10-2M in propionic acid?
The molecules CH4 and CH3Cl both have tetrahedral shapes. Why is CH4 nonpolar whereas CH3Cl is polar
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 353.0 Torr at 45.0 °C. Calculate the value of ?H°vap for this liquid and calculate the normal boiling point of this liquid in °C.
Show that the function si=x*e^(-ax^2) is an eigenfunction of the operator d^2/dx^2 - 4(a^2)(x^2). What is the eigenvalue.
What is the weight percent concentration of sodium carbonate in your unknown if it takes 37.25 mL of 0.1018 M hydrochloric acid to reach the second equivalence point of the titration
It is assumed that the relative standarddeviation of the method is sr ? s = 4 ppt forcarbon and 6 ppt for hydrogen. The means of the reported resultsare 68.5% C and 4.88% H. At the 95% confidence level, is there anyindication of systematic error i..
Calculate the pressure that CCl4 gas will exert at 40 degrees celsius if 1.00 mol occupies 28.0 L, assuming that: A. CCl4 obeys the ideal-gas equation
nh3 is kept in a cylinder with a movable piston at the temperature of 25 degree celcius and the pressure of 2.50 atm
What is being oxidized and what is being reduced: feso4 + k2cr2o7 + h2so4 = cr2(so4)3 + fe2(so4)3 +h2o + k2so4
The vapour pressure of a liquid in the temperature range 200K to 260K was found to fit the expression: ln (P/Torr)=18.361-3036.8/(T/K) What s the enthalpy of vapourisation of the liquid?
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