What is the entropy change of ice to water and water to vapor?

AI Thread Summary
The discussion focuses on calculating the entropy change for two processes: the melting of ice and the evaporation of water. For the melting of a 33.0 g ice cube, the relevant equation involves the heat of fusion and the temperature of the surrounding water. For the evaporation of a 7.3 g spoonful of water, the heat of vaporization and the temperature above boiling must be considered. Participants emphasize the need for specific equations related to phase changes, including ΔS = q/T, where q is the heat absorbed or released and T is the temperature in Kelvin. Understanding these concepts is essential for solving the entropy change problems presented.
kukulalalu89
Messages
8
Reaction score
0
1.) What is the entropy change of a 33.0 g ice cube that melts completely in a bucket of water whose temperature is just above the freezing point of water? (J/deg)




2.) What is the entropy change of a 7.3 g spoonful of water that evaporates completely on a hot plate whose temperature is slightly above the boiling point of water?
 
Physics news on Phys.org
Show work.
 
I don't even know how to solve the question!

what equations do I need?
 
kukulalalu89 said:
what equations do I need?
What equations do you think that you need?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Change in Entropy When Mixing Water at Different Temperatures
Replies
5
Views
1K
What Is the Entropy Change When Ice Melts in Hot Water?
Replies
2
Views
2K
Confusion about whether to use the specific heat of water or ice
Replies
4
Views
2K
What is the Entropy Change When Water Freezes to Ice?
Replies
4
Views
1K
Reversible heat exchange between water and ice
Replies
6
Views
2K
Change in entropy when mixing cold and hot water
Replies
12
Views
4K
Entropy change for two masses of water mixed adiabatically
Replies
1
Views
2K
Piece of iron put into container with ice
Replies
4
Views
1K
Are theses approaches correct? (entropy change of water turning into steam)
Replies
9
Views
4K
Solve Entropy Gen of Water-Ice Contact, 100J Transferred
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top