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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.
Heat steam from 100 °C to 120 °C. The heat needed to change the temperature of a given substance (with no change in phase) is: q = m × c × Δ T (see previous chapter on thermochemistry). The heat needed to induce a given change in phase is given by q = n × Δ H.
Heat with Phase Change Worksheet. 1) How many joules are required to heat 250 grams of liquid water from 00 to 1000 C ? 2) How many joules are required to melt 100 grams of water? 3) How many joules are required to boil 150 grams of water?
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?
The latent heat of fusion is the amount of heat needed to cause a phase change between solid and liquid. The latent heat of vaporization is the amount of heat needed to cause a phase change between liquid and gas.
Learning Objectives. Describe phase changes. Explain the relationship between phase changes and heat transfer. So far we have discussed temperature change due to heat transfer. No temperature change occurs from heat transfer if ice melts and becomes liquid water (i.e., during a phase change).
Learn Latent Heat & Phase Changes with free step-by-step video explanations and practice problems by experienced tutors.
