Compare the rates of transport of acetone vapor and water vapor through a stagnant gas film and comment on this comparison. the system is that of section 18.2. note that you are not to consider the diffusion of acetone vapor through water vapor; rather, you are to compare the rate of acetone vapor transport through a gas species to the rate of water vapor transport through a gas species. a quantitative (i. e. - numerical) comparison is required. it is acceptable to express the answer as the ratio of the molar fluxes of acetone vapor to water vapor.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.