Suppose your favorite TV scientist has equal masses of frozen water (ice) and liquid water. If she decides to cause both substances to go through a phase change to a phase with more energy (ice to water, water to steam), which substance will require more energy to change phases? The latent heat of fusion for water is Lf,water-3.33. 105, and the latent heat of vaporization for water is Ly,water=2.26. 106 O Changing liquid water to steam requires more energy. O Changing ice to liquid water requires more energy. O They require the same amount of energy.

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Suppose your favorite TV scientist has equal masses of frozen water (ice) and liquid water. If she decides to cause both substances to go through a phase change to a phase with more energy (ice to
water, water to steam), which substance will require more energy to change phases? The latent heat of fusion for water is Lf,water=3.33. 105, and the latent heat of vaporization for water is
kg
Lv,water=2.26. 106 J
kg
Changing liquid water to steam requires more energy.
Changing ice to liquid water requires more energy.
They require the same amount of energy.
Select true or false for the following statements.
===
▪
Vaporization is when a substance goes from a gas to a liquid.
The temperature of a substance does not change during a phase change.
✓ It always takes the same amount of energy to change a substance from solid to liquid as it does to change it from liquid to gas.
✓A substance can exist in two different states of matter at the same temperature.
The negative sign in the equation Q=± mL represents when thermal energy is being taken away from a substance during a phase change.
The temperature of a substance changes during a phase change.
Transcribed Image Text:Suppose your favorite TV scientist has equal masses of frozen water (ice) and liquid water. If she decides to cause both substances to go through a phase change to a phase with more energy (ice to water, water to steam), which substance will require more energy to change phases? The latent heat of fusion for water is Lf,water=3.33. 105, and the latent heat of vaporization for water is kg Lv,water=2.26. 106 J kg Changing liquid water to steam requires more energy. Changing ice to liquid water requires more energy. They require the same amount of energy. Select true or false for the following statements. === ▪ Vaporization is when a substance goes from a gas to a liquid. The temperature of a substance does not change during a phase change. ✓ It always takes the same amount of energy to change a substance from solid to liquid as it does to change it from liquid to gas. ✓A substance can exist in two different states of matter at the same temperature. The negative sign in the equation Q=± mL represents when thermal energy is being taken away from a substance during a phase change. The temperature of a substance changes during a phase change.
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