Aerosol particles (solids and liquids suspended in air) are produced by natural and human causes and are found all over the world. At high concentrations, they have negative impacts on human health, affect global climate, and disrupt precipitation patterns (Bilde et al., 2015). The partitioning of a material between the aerosol to the vapor phase can be represented by the vapor pressure. Molecules with low vapor pressure will more readily partition to the condensed phase. Thus, it is important to understand and study the vapor pressure of compounds found in the atmosphere, for it provides information on the distribution of mass between the gas and condensed phase. This information is a crucial input to models of atmospheric and climate chemistry locally and globally. We present the first measurements performed on the Union College ElectroDynamic Balance (EDB). In the EDB, a single particle is levitated under controlled, atmospherically relevant conditions and the size of the particle is monitored using spectroscopy to a precision of less than 1 nm (1x10-9 m). Temperature and humidity dependent evaporation rates were measured for 2-methylsuccinic acid, allowing determination of its enthalpy of vaporization and vapor pressure at 298.15 K. Using Raman spectroscopy and changes in evaporation rate we can infer changes in the chemical composition of the particle. A series of experiments with oxo- and hydroxy-substituted dicarboxylic acids under supersaturated conditions to demonstrate chemical reactivity of these compounds (such as the formation of anhydrides) will be discussed.