Why Does Temperature Remain Constant When Water Boils?

AI Thread Summary
When water reaches its boiling point, the temperature remains constant despite continuous heat energy transfer. The graph of time versus temperature would show a linear increase to 100 degrees Celsius, followed by a horizontal line during the boiling phase. This horizontal line indicates that the temperature does not rise because the energy is used for the phase change from water to steam. The heat energy is absorbed to break molecular bonds rather than increase temperature. Thus, during boiling, the temperature remains stable while energy is utilized for vaporization.
physgirl
Messages
99
Reaction score
0
So if heat energy is transferred at a constant rate until the water reaches its boiling point temperature (in 6 min let's say)... and then heat energy is transferrred at the same rate as the water boils for the next 4 min...

would the graph of time v. temperature look like: a straight line with constant slope going from original water temperature to 100 degrees in the first 6 minutes and then a straight horizontal line b/w 6 min and 10 min?

also, if that is correct, for the last 4 minutes, is the temperature constant despite the heat energy transfer because... the energy was being spent on changing water to steam rather than increasing the temperature?
 
Physics news on Phys.org
Yes and yes.
 

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

Do you need to account for the water heating up to the boiling point?
Replies
23
Views
2K
Experimenting whether the diameter of a pot affects boiling time for water
Replies
15
Views
2K
How much water is converted to ice?
Replies
1
Views
3K
Cooking (Thermodynamics) Problems
Replies
14
Views
4K
Heat transfer to solution per litre
Replies
2
Views
1K
Power Radiated From a Copper Cube
Replies
3
Views
801
Entropy and the Laws of Thermodynamics
Replies
3
Views
1K
When to convert units of temperature?
Replies
2
Views
2K
How to find internal energy with constant temperature?
Replies
3
Views
2K
How much water evaporates per minute from a copper pot on a stove?
Replies
4
Views
1K

Hot Threads

Recent Insights

Back
Top