# Second Challenge Concise Summary

Problem 1: Vapor Pressure and Heat of Vaporization of Liquids

Part 1-1 Definition:

Determine the value (and uncertainty) of the vapor pressure and heat of vaporization of acetone [CAS # 67-64-1] at these temperatures:
330, 375, 425, and 460 K

Conditions:

Liquid and Gaseous acetone at temperatures of 330, 375, 425, and 460K

Part 1-2 Definition:

Determine the value (and uncertainty) of the vapor pressure and heat of vaporization of butyramide [CAS # 541-35-5] at these temperatures:
415, 455, 490, and 520 K

Conditions:

Liquid and Gaseous butyramide at temperatures of 415, 455, 490, and 520 K

Problem 2: Henry’s Law Constant

Problem 2 Definition:

Determine the Henry’s law constants (HLC) of 4 common gases (N2, CO2, CH4, and O2) in one organic solvent (ethanol [CAS # 64-17-5]) at two temperatures (323 and 373 K). Also specify the uncertainty in the reported values.

Conditions:

Liquid ethanol and gas N2, CO2, CH4, and O2 at 323 and 373K.

Problem 3: Heat of Mixing

Part 3-1 Definition:

Determine the heat of mixing of n-butylamine [CAS # 109-73-9] and n-heptane [CAS # 142-82-5] at n-butylamine mole fractions of 0.2, 0.4, 0.6, and 0.8 and temperatures of 298 and 348 K and a pressure of 101.325 kPa (a total of 8 state points). Also specify the uncertainty in the reported values.

Conditions:

Liquid n-butylamine and n-heptane and mixtures of both at 298K and 348K; All at a pressure of 101.325 kPa

Part 3-2:

Determine the heat of mixing of n-butylamine [CAS # 109-73-9] and water [CAS # 7732-18-5] at n-butylamine mole fractions of 0.2, 0.4, 0.6, and 0.8 and temperatures of 298 and 348 K and a pressure of 101.325 kPa (a total of 8 state points). Also specify the uncertainty in the reported values.

Conditions:

Liquid n-butylamine and water and mixtures of both at 298K and 348K; All at a pressure of 101.325 kPa