All the following are characteristic properties of phosphorus. which one is a chemical property?
(a) when exposed to air, white phos- phorus will burn spontaneously, but red phosphorus will not.
(b) red phosphorus and white phos- phorus are solids.
(c) the white form is soluble in liquid carbon disulfide but is insoluble in water.
(d) the red form of phosphorus is in- soluble in both water and carbon disulfide.
(e) the red form melts at about 600 ◦ c, and the white form melts at44◦ c.

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal