Theoretical max. pressure of a given quantity of water freezing to ice

AI Thread Summary
The discussion centers on calculating the maximum pressure exerted by freezing water in rock crevices, which contributes to erosion. At a temperature of 263.15 K, the densities of ice and water are provided as 0.9 g/cm³ and 1.0 g/cm³, respectively. The volume change during freezing is noted to be 20 cm³ for 1 mole of water, with a ΔV of 2 cm³. Participants express uncertainty in relating the change in volume to pressure due to a lack of information on the geometry and area involved. The conversation highlights the complexity of determining the force exerted by expanding ice and its implications for rock erosion.
anisotropic
Messages
59
Reaction score
0

Homework Statement



Water in rock crevices often causes erosion when it freezes, given it expands and exerts pressure on the rock. What is the maximum pressure that water can exert when it freezes?

T = 263.15 K
dice @ 263.15 K = 0.9 g cm3
dwater @ 263.15 K = 1.0 g cm3

Homework Equations



Force = Pressure x Area

Perhaps?...

The Attempt at a Solution



Assuming 1 mole of water, the volume of the ice would be 20 cm3 (ΔV = 2 cm3).

I don't know how to relate the change in volume to the pressure exerted, though. It's not like I know the geometry of the water and how much area it has to be able to use the equation in 2. Nor do I know how to determine the force exerted by the water as it expands (I know how much mass is being displaced, but don't know how to determine it's acceleration, assuming I need to use Force = Mass x Acceleration).
 
Last edited:
Physics news on Phys.org
anisotropic said:
P = force x area

That's wrong.

Not that it changes anything.
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
View full post »

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
View full post »

Similar threads

Max water pressure allowable on solar panels
Replies
16
Views
2K
How Do Ice Formation and Salinity Affect Water Column Depth and Pressure?
Replies
3
Views
2K
How to calculate freezing time for a moist food by-product (75% water)
Replies
6
Views
634
Biology Water Potential and Osmosis Potatoes Investigation
Replies
6
Views
4K
The Clausius-Clapeyron relation to study pressure cookers
Replies
2
Views
3K
Pressure for Frozen Water: Solving 6.6*10^(8) N/m^2
Replies
1
Views
2K
How Do You Calculate Thermodynamic Properties for Heated Water?
Replies
1
Views
12K
Fluid Mechanics, Particle Size, Bouyouncy Force
Replies
16
Views
2K
How Deep Would the Water Ice Layer Be on the Moon?
Replies
1
Views
3K
How Does Pressure Affect the Boiling Point of Water?
Replies
2
Views
7K

Hot Threads

Recent Insights

Back
Top