Students want to impress their physics teacher by writing an essay that describes the heating of ice at a temperature below 0°C to steam at a temperature above 100°C. Write such a paragraph using the terms energy, temperature, and phase change. Be sure to include a description of the five major stages.

Energy is required to change the phase of a substance, such as the energy to break the bonds between molecules in a block of ice so it may melt.

During a phase change energy my be added or subtracted from a system, but the temperature will not change. The temperature will change only when the phase change has completed.

The heat Q required to change the phase of a sample of mass m is given by

Q

=

mL

f

(melting or freezing) and

Q

=

mL

v

(evaporating or condensing), where Lf and Lv are the latent heat of fusion and the latent heat of vaporization, respectively.

Key Terms

latent heat of fusion: the energy required to transition one unit of a substance from solid to liquid; equivalently, the energy liberated when one unit of a substance transitions from liquid to solid.

latent heat of vaporization: the energy required to transition one unit of a substance from liquid to vapor; equivalently, the energy liberated when one unit of a substance transitions from vapor to liquid.

sublimation: the transition of a substance from the solid phase directly to the vapor state such that it does not pass through the intermediate, liquid phase

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

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explanation:

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is