All Questions
Tagged with water phase-transition
157
questions
0
votes
6
answers
152
views
Why won't there be any transfer of heat energy when ice at 0°C is in contact with water at 0°C in a closed container?
In my book, Concise Physics of Selina Publications for Class IX, it's written there that "If there is no transfer of heat between the two bodies placed in contact, they are said to be at the same ...
- 23
9
votes
3
answers
2k
views
Rotating a Pot of Boiling Water on a Stove
I have just boiled a half dozen eggs and wanted to ask about a phenomenon I have witnessed for years but have bottled up inside for so long. Why, when the water is near boiling and nice and hot, does ...
0
votes
1
answer
38
views
Water and ice, scales [closed]
There are scales with an identical bowl on each pan. We pour some amount of water into the first bowl. We pour less water and put an ice cube into the second bowl so the level of water in both bowls ...
- 23
3
votes
1
answer
94
views
Does having a liquid (less dense than ice) above a floating (in water) ice cube, change the fact that the water level remains constant when ice melts?
An ice cube floats in water, with a liquid (less dense than ice) above it. When the ice cube melts will the water level go up, down or remain constant?
- 135
2
votes
2
answers
74
views
Can latent heat exist when both phases cannot exist at same temperature?
This is my understanding (please tell me if i am going wrong anywhere):
During phase change (i.e. ice melting into water) the molecules absorb heat, gain more random kinetic energy, and spread apart (...
2
votes
2
answers
75
views
For a liquid at boiling point, how can it require a set amount of heat (latent heat) to vaporize
I've always had a hard time wrapping my head around the 2 below statements being true for vaporizing a liquid into a gas:
When a liquid reaches its boiling point the temperature stops rising (and any ...
- 21
1
vote
1
answer
31
views
Why does the freezing point of water regress at select pressures before increasing again at even higher pressures?
This phase diagram of water shows how the phase of water is determined by the pressure and temperature.
I find it easy enough to understand; as the pressure increases, the boiling point of water also ...
- 163
1
vote
2
answers
317
views
Effect of impurities on boiling and freezing points
When impurities like salt is added to water, the boiling point of water increases because of what I think is vapour pressure, though I know very little about that too. However, with the same analogy, ...
- 19
7
votes
3
answers
4k
views
Why does more ice melt slower than less ice?
I know that ice cubes that are larger melt slower because of their surface area. However, when you put more ice cubes in a cup, all the cubes melt slower than a cup with less cubes. I hope this makes ...
- 539
1
vote
1
answer
751
views
What effect does salt have on the boiling speed of water?
My question is the following:
I have two pots. Pot A and pot B. I fill both of them with 1l (litre) of water. Now I add a table spoon of salt into pot A. Which water is going to start boiling first?
I ...
- 23
1
vote
1
answer
4k
views
At what temperature does flowing water start to freeze?
We know that flowing water remains liquid even in the below-zero temperatures (a good example is rivers in arctic regions). Of course water doesn't remain liquid forever if temperature goes down ...
- 402
0
votes
0
answers
47
views
Why does water ice on the Moon not sublime?
I heard that water in form of ice was found on the Moon. Why would the ice not sublime (evaporate) due to low atmospheric pressure?
- 79
0
votes
1
answer
69
views
Why does temperature increase like this? [duplicate]
My book makes the following claim: Suppose you drop a bunch of large and small ice cubes of temperature $0$ degrees in a beaker of water, then you start heating the beaker, the temperature of the ...
- 137
15
votes
7
answers
4k
views
Why is there a maximum humidity?
Recently I've been browsing humidifiers for my room. Everyone "knows" that humidity is measured in percentages, and 100% humidity is the maximum humidity that the air "can hold" - ...
- 6,936
7
votes
2
answers
331
views
Is there a name for this phenomena that I observed?
I wish I had recorded this, but I was about to get some water from my filter as I was thirsty, but I noticed it had frozen in my refrigerator, so I poured some water into it from the refrigerator, and ...
- 2,001