Consider the following thermodynamic data at 25C and the normal boiling point of N2O4 is 21.69C.

Calculate S for the vaporization of 2 mol of N2O4. Assume H does not change
with temperature. (7 marks)

Species Hf (kJmol-1)
N2O4(l) -19.50
N2O4(g) 9.16

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.