Which is an example of a chemical change?
a. mixing of poster colors
b. formation of clouds
c. metal corroding in salt water
d. sugar dissolving in water
e. separating salt from seawater

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.