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Posted (edited)

i have tried putting a cube of ice in water and one in air and found that ice melts faster and the same with the dry ice

so i am confused about it can someone help me?

 

 

Stick your hand in room temp water, how does it feel compared to the air in the room?

Edited by Moontanman
Posted

 

!

Moderator Note

Could you please stop calling people bro? It's not really against the rules, but damn is it annoying.

but they didnt have any problem and if they then they can say me directly :(

Posted

There is a better transfer of energy from the warm water to the cold ice cube than there is from the warm air to the cold ice cube.

 

 

Don't do it for him... tongue.png

Posted

There is a better transfer of energy from the warm water to the cold ice cube than there is from the warm air to the cold ice cube.

what if water is coller but still ice melt faster

Posted (edited)

i have tried putting a cube of ice in water and one in air and found that ice melts faster and the same with the dry ice

so i am confused about it can someone help me?

 

1 cm^3 of air has ~2.68*10^19 molecules at 0 C, s.p.

1 cm^3 of water has ~3.345*10^22 molecules of H2O.

 

Collisions between cold object molecules and water molecules are more probable than collisions with rare oxygen & nitrogen molecules.

 

In thermic cups and thermoses there is even used layer of vacuum, to separate hot/cold content from environment.

Edited by Sensei
Posted

Think of it this way. When you melt an ice cube, what is happining. Do you think water might have any properties that make it easyier for the ice to melt in it then in air.

Posted

The relevant parameters are the heat capacity, the mass and the temperature. Q = mC [math]\Delta T[/math]

 

m is the mass, C is the specific heat

 

The water may have a smaller temperature difference, but there's a lot more of it, and water has the ability to absorb more heat per unit mass for a given temperature increase.

 

For the record, I also find it annoying being referred to as Bromine Oxide.

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