Iodine, like most substances, exhibits only three phases; solid, liquid, and vapor. The triple point of iodine is at 90 torr and 115 degrees Celcius. Which of the following statements concerning liquid I2 must be true? Explain your answer.
a.) I2 (l) is more dense than I2 (g).
b.) I2 (l) cannot exist above 115 degrees Celcius.
c.) I2 (l) cannot exist at 1 atmosphere pressure.
d.) I2 (l) cannot have a vapor pressure greater than 90 torr.
e.) I2 (l) cannot exist at a pressure of 10 torr.