In thermogravimetric analysis (TGA), weight change of a material sample during decomposition with temperature is shown in the figure below.
$\mathrm{W}_{\mathrm{i}}$ and $\mathrm{W}_{\mathrm{f}}$ represent the weight of the material, corresponding to temperatures $T_{i}$ and $T_{f}$, respectively. Which of the following factor(s) can influence $T_{i}$ and $T_{f}$ ?
- Heating rate
- Particle size of the material
- Atmosphere in the sample chamber
- Initial weight of the sample
