physical science

why does the temperature of boiling water remain the same as long as the boiling continues?

Because it is a pure compound undergoing a phase change. The constant temperature is a requirement of the Gibbs Phase Rule. It is not obvious why this happens. If the compound is not pure, the tempertaure will rise as it boils off the most volatile components.

Heat is required to change the liquid water to steam (from liquid to gas). As long as there is water in the boiling pot, that process will continue; i.e., water will continue to boil and change from liquid to gas. AFTER all the water has been changed from liquid to gas, THEN (and only then) will the temperature of the steam begin to rise if additional heat is added.

  1. 👍
  2. 👎
  3. 👁
  1. It takes allot of energy to vaporize water. Several BTUs for each change of state because it's changing the molecular structure. Not as much energy required to change temperature in same state.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. chem class

    which of the following has the highest boiling point? a)C2Cl6 b)C2Br6 c)C2H6 d)C2F6 e)C2I6 i know its e, but why is that the answer? are all questions about boiling points similar? or they they have to do with intermolecular

  2. Chemistry

    Imagine that your water heater has broken, but you want to take a bath. You fill your bathtub with 25kg of room-temperature water (about 25C). You figure that you can boil water on the stove and pour it into the bath to raise the

  3. college chem

    a student dissolves 1.0mole of sucrose in 1000 grams of water at 1.0atm. Compared to the boiling point of pure water , the boiling point of the solution is?

  4. chemistry

    A solution is prepared by dissolving 104.1 grams of barium chloride, BaCl2 in 1000. grams of water? What is the boiling point of this solution? [The boiling point elevation constant for water is 0.52°C/mole solute in 1000g of

  1. chem

    why do we add boiling chips or boiling stones before the distillation starts? Boiling chips should never be added to a hot solution!Why? i don't know what the answer is to the first one, but as for the second i think i have a

  2. Chemistry

    What is the effect on the boiling point of a solution (for example, water) produced by a soluble nonvolatile substance (for example, sodium chloride)? What is the effect of an insoluble substance such as sand or charcoal? I

  3. HVAC

    Two HVAC technicians are discussing the properties of water.Technician A says that if the pressure of water is raised,the boiling point will decrease.Technician B says that placing water in a vacuum will cause its boiling point to

  4. chemistry

    Crude oil pumped out of the ground may be accompanied by the formation of water, a solution that contains high concentrations of NaCl and other salts. If a boiling point of a sample of the formation of water is 2.0 Celsius above

  1. science

    2. A 75.0 g sample of a metal is placed in boiling water until its temperature is 100.00C. A calorimeter contains 100.00 g of water at a temperature of 24.40C. The metal sample is removed from the boiling water and immediately

  2. American Lit

    Which sentence has an elliptical adverb clause with an understood word or words? Water turns into ice when the temperature is lowered to 32°F. As we travel higher than does the sea level, the boiling point of water drops. Methyl

  3. chemistry

    At a certain elevation, the boiling point of water is 98.5°C. How much energy is needed to heat 35.0 mL of water to the boiling point at this elevation if the water initially was at 23.4°C? (Cp=75.38J/(mol*C), d= 1.00g/mL)

  4. Science

    Why does the temperature remain constant around 0 degrees C and 100 degrees C? For what? For water when it is freezing or boiling? Or do you have another question in mind? Sorry, it's for water when it is freezing or boiling.

You can view more similar questions or ask a new question.