Thread: a mind twister (mad scientist style)

ok,here's one.

you have a filled deodorant spray can and water.you have to convert the water into ice (just a drop to be precise).how do you do it.

please don't google it,and any ways it's not there ,i have checked.i found out the solution one day by accident when i was "playing".

the basic principle is simpler than you think,just needs a bit of application.
so here's my challenge.CRACK IT.

i dont hope the answer is as stupid as putting the water into fridger...

but let me try..

you put the water in a metallic glass and you pur the deo around it (inside the tumbler) keeping the deo will evaporate it and maybe cooling agent...

hey man mickey,you got it.the propellant in the deo (not the perfume part) evaporates at room temperature and it takes the latent heat of evaporation from the water and this latent heat of evaporation is more than the latent heat of solidification of water.so woola,it solidifies.
this is actually the basic principle behind all fluid cooling systems.

That was Pretty simple....now figure this out, how to retrieve the propellant ?device a system and make it as practical as possible..

Originally Posted by rajan1311

That was Pretty simple....now figure this out, how to retrieve the propellant ?device a system and make it as practical as possible..

ok,here's my guess.i capture the whole vapour coming out from the physical reaction.do a fractional distillation to extract the propellant in whatever state it is in,i guess it will be gaseous.do a compression cycle until it is good enough for a condensation to liquid state and then bottle it.is this good enough?
i consider it economical because i am reusing the propellant again,which is better than actually making it or extracting it from petroleum.

^^oyee.. punjab da king freezer mein na dalda?? lassi garam hogayi lai..

Who is this 'punjab da king' ??? I thot i was king !


And rajan whats the ans to your query ?

^^oye saccha king to sabde uppar hai..

voi hai saccha baadshaan..

what do you exactly mean by a compression cycle? tell how that will work?

compression stage involves compressing the gas to a pressure from which it would easily condense to a liquid state at room temperature,upon passing it through a heat exchanger,exactly like those R series refregerants are used in AC and refregerators goes through.it involves the same principle of cryo cooling to liquify a gas whose gas to liquid transformation temperature is very low compaired to room temperature so a compression stage is required.

but this is the easy part.i thought the extraction or separation of the propellant from atmosphere gases was the challenging part.what solution did you have in mind when you asked me about the separation process.

i dont hope the answer is as stupid as putting the water into fridger...