Anonymous
Anonymous asked in Science & MathematicsChemistry · 6 months ago

How do you solve this chemistry problem? A beaker that contains 500g of liquid water is heated until all the water is completely evaporated.?

A. Calculate the total energy required to heat the water from 25 degrees C (room temp.) to its boiling point.

B. Calculate the total energy required to vaporize all the water to steam.

1 Answer

Relevance
  • 6 months ago
    Favorite Answer

    The following information is from two tables in my physics book. The specific heat of water is 4,186 J/(kg * ˚C). The heat of vaporization of water is 2.26 * 10^6 J/kg. For increasing the temperature of the water, use the following equation.

    Q = mass * specific heat * ∆ T

    Q1 = 0.500 * 4,186 * 75 = 156,975 J

    For evaporating, use the following equation.

    Q = mass * heat of vaporization

    Q2 = 0.500 * 2.26 * 10^6 = 1.13 * 10^6 J

Still have questions? Get your answers by asking now.