Energy Balances with Phase Changes: Screencasts
Overview of sensible and latent heats and how to account for phase changes in energy balances.
We suggest that after watching this screencast, you list the important points as a way to increase retention.
Provides an overview of latent heat. Calculates the heat required to vaporize and condense 100 mol of water at 100°C and atmospheric pressure.
We suggest that after watching this screencast, you list the important points as a way to increase retention.
Important Equations:
Overview of sensible and latent heats and how to account for phase changes in energy balances.
\[\Delta H_m = \Delta U_m\]
where \(\Delta H_m\) is the enthalpy change when a solid melts, and \(\Delta U_m\) is the internal energy change when a solid melts.
Sensible Heat:
\[\Delta H = \int C_P dT\]
where \(\Delta H\) is the enthalpy change, \(C_P\) is the heat capacity, and \(T\) is temperature.
Latent Heat for vaporization:
\[\Delta H = \Delta H_{vaporization}\]
\[\Delta H_{condensation} = – \Delta H_{vaporization}\]