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1. What is latent heat? 2. Why does the temperature of H2O not increase when it is boiling? Explain your answer by drawing a heating/cooling curve for water. 3. Describe the difference between latent heat of fusion versus latent heat of vaporization. Which process involves energy being absorbed? 4.
Determine the phase changes that carbon dioxide undergoes as the pressure changes if the temperature is held at −50 °C? If the temperature is held at −40 °C? At 20 °C?
If there were a change in the phase of matter (solid $\Leftrightarrow$ liquid or to liquid$\Leftrightarrow$ gas) read the following page to learn more: Solved problems on latent heat of fusion. Solved Problems on latent heat of vaporization.
The heat needed to change the temperature of a given substance (with no change in phase) is: q = m × c × ΔT (see previous chapter on thermochemistry). The heat needed to induce a given change in phase is given by q = n × ΔH. Using these equations with the appropriate values for specific heat of ice, water, and steam, and enthalpies of ...
Learn Latent Heat & Phase Changes with free step-by-step video explanations and practice problems by experienced tutors.
Q = m L f (for melting/freezing), Q = m L v (for vaporization/condensation), where L f is the latent heat of fusion, and L v is the latent heat of vaporization. The latent heat of fusion is the amount of heat needed to cause a phase change between solid and liquid.
Latent heat is an important concept to know in the study of phase changes, and this quiz/worksheet will help you test your understanding of it as well as related scientific principles.
