Water sounds different when hot

[Butcher]

water that has been boiled an allowed to cool, not boiling.

In certain circumstances hot water freezes first. https://en.wikipedia.org/wiki/Mpemba_effect
However this is not universally true - most of the time cold water freezes before hot.

[snedger]

Wow, you're right, just tried it - cold water sounded like silence and when I placed my ear to the kettle it sounded something like screaming.

[MLyons]

Wow, you're right, just tried it - cold water sounded like silence and when I placed my ear to the kettle it sounded something like screaming.

pour the hot water out into a mug and listen, it will sound low pitched. Then fill the kettle with cold water and pour it into a mug, it will be high pitched

[Zak33]

Wow, you're right, just tried it - cold water sounded like silence and when I placed my ear to the kettle it sounded something like screaming.

no bud, that was you screaming, as you burned your ear off

[Ttaskmaster]

It's also true that boiling water freezes faster than cold water. As weird as that might sound.

Supposedly putting hot water in your ice cube freezer tray instead of cold will result in clear ice cubes...

[Butcher]

You boil off a lot of the dissolved gasses (which cause cloudy ice), so yes, you'll get clearer ice cubes.

[GoNz0]

I can hear when the hot water finally gets hot so I can go back to the sink and push the plug down, never gave it a moment's thought until I heard it on QI and tbh didn't give it any more thought after that

[certvalue111]

i really dont agree with this.. I feel it sounds same even when it cold or hot

[Zak33]

https://en.wikipedia.org/wiki/Earwax

[EndlessWaves]

pour the hot water out into a mug and listen, it will sound low pitched. Then fill the kettle with cold water and pour it into a mug, it will be high pitched

But that water hasn't been boiled and as mentioned boiling water has other effects than just changing it's temperature.

You need two kettles (identical if possible). Boil one and let it cool back to room temperature and then boil the other. Then see if it the hot and cold boiled water sound different.

[sameerkhan9]

It's also true that boiling water freezes faster than cold water. As weird as that might sound.

Yes, You're right.