A quantity of steam?

Question

A quantity of steam (200g) at 110C is condensed, and the resulting water is frozen into ice at 0C. How much heat was removed?

Answer 1

To solve this problem, one must know 4 peices of information.
One needs to know,
-The specific heat of steam
-The heat of vaporization of water
-The specific heat of water
-The heat of fusion of water

One would use these two formulas,
Q = m*C*(delta T)
where W is the heat energy, m is the mass, C is the specific heat, and (delta T) is the change in temperature.
and
Q = m*L
where Q is again the heat energy, m is the still the mass, and L is the latent heat of fusion.vaporization of the substance.

This problem has 4 smaller parts one needs to solve in order to find the final answer.
As the steam is condensed into ice, 4 things happen in this order,
-First the 110 degree C steam is cooled to 100 degrees C
-100 degree C steam is condensed into 100 degree C liquid water
-100 degree C liquid water is cooled to 0 degree liquid water
-0 degree C liquid water is frozen into 0 degree C ice.

Find the energy removed from the substance (H2O in whatever physical phase is appropraite at the time) and sum it up.

Answer 2

To be absolutely correct, you must also state the pressure at which the 110 C steam starts. A small potential difference but still a possible difference.

Answer 3

i don't think heat is the correct term more as to energy. Heat is a form of energy it takes 2257 joules to vaporize one gram of water. Since time isn't a variable for this question its a total of 451400 joules radiating out for it to return to water as it cools the energy state of 0 since its not free flowing and as it freezes it remains the same. how ever the potential energy remains.

Answer 4

To be honest water cannot be frozen at 0 C, at this temperature you can call its state as neutral because water starts freezing -0.01 C

Answer 5

Sorry I'm going to take Physics in two years. LOL!