PHYSICS LAB MANUALS

Phase Change – Latent Heat

  1. Heat absorbed by air inside calorimeter cup
  2. Loss of heat to atmosphere

ERROR ANALYSIS

Heat of Melting:

$$ \frac{\Delta L_{f}}{L_{f}} = \frac{\Delta m_{i}}{m_{i}} + \frac {\Delta (T_{f} - T_{i})}{(T_{f} - T{i})} + 2\frac{\Delta (T_{f} - T_{w})}{(T_f - T_w)} + \frac{\Delta m_w}{m_w} + \frac {\Delta m_c}{m_c} $$

Heat of condensation

$$ \frac{\Delta L_v}{L_v} = \frac{\Delta m_{steam}}{m_{steam}} + \frac{\Delta (T_f - T_s)}{(T_f - T_s)} + 2\frac {\Delta (T_f - T_w)}{(T_f - T_w)} + \frac{\Delta m_w}{m_w} + \frac {\Delta m_c}{m_c} $$