Which statement is true regarding the heating curve below? Note chat C_3H_8O has
ID: 1067424 • Letter: W
Question
Which statement is true regarding the heating curve below? Note chat C_3H_8O has only one solid, one liquid, and one gas phase under the given conditions The inverse of the slope of line segment A-B represents the molar heat capacity of the gas. The temperature associated with point D represents the melting point or - the substance. The inverse of the slope of line segment C-D represents the mo area capacity for the liquid. Line segment E-F represents the heat of vaporization for the solid The boiling point for the substance is 184.8 K.Explanation / Answer
Lets first describe about the cooling curve
A to B is the heat provided in order to bring solid in liquid phase. So A to B is the molar heat of solid.
From B to C , solid is melting and so this region is called as Delta H of fusion.
From point C to D, we have liquid and this region shows the molar heat capacity of liquid phase.
From D to E its heat of vaporization.
From point E to F its heat capacity of vapor phase.
So correct answer for this is “C) The inverse of slope of line segment C-D represents the molar heat capacity for the liquid”
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