Che201 Quiz ??Water is universal solvent due to polarity. ??Ideal gas equation is Pv= nRT ??A key property in thermodynamic is Temperature. ??The quantitative study of heat changes is Thermochemistry. ??If we bring any change at equilibrium the system compensate for change this is called Le Chateliers Principle. ??The system in which heat change is negative is endothermic. ??Feezing point is a cogitative property. ??The amount of heat needed to increase the temperature of one gram of substance by degree is specific heat capacity. ??Definition of Zeroth law of Thermochemistry. ??Entropy of perfect crystalline substance is zero at absolute zero. ??A large number of experiments have determined that 4 variables are sufficient to define the physical condition of a gas. ??When ?G is negative, the forward reaction is spontaneous. ??Ideal gas obeys Roults law.