A substance, \(X\), has the following properties: Sketch a heating curve for substance \(\mathrm{X}\) starting at \(-50 .{ }^{\circ} \mathrm{C}\).

The heating curve of substance X can be sketched as follows: 1. Start with a sloping line from the initial temperature of \(-50^{\circ} \mathrm{C}\) (solid phase) to the melting point at \(16^{\circ} \mathrm{C}\). 2. Draw a horizontal line at the melting point temperature (\(16^{\circ} \mathrm{C}\)) representing the phase change from solid to liquid. 3. Continue with a sloping line representing the temperature increase of the liquid phase until the boiling point at \(84^{\circ} \mathrm{C}\). 4. Draw a horizontal line at the boiling point temperature (\(84^{\circ} \mathrm{C}\)) representing the phase change from liquid to gas. 5. Label the starting temperature (\(-50^{\circ} \mathrm{C}\)) and the melting and boiling points (\(16^{\circ} \mathrm{C}\) and \(84^{\circ} \mathrm{C}\), respectively) on the y-axis.