The figure shows how the temperature of 100 g of a substance varies when it is heated from -100°C to 70°C, where the horizontal axis represents the heat delivered to the substance in kilocalories and the vertical axis represents its temperature in degrees Celsius. Answer the following questions using the equations seen in the course.a) What are the melting and boiling points of the substance?b) Calculate the specific heats of the substance in its solid, liquid and gas phases in cal/g°C.c) Calculate the latent heats of fusion and vaporization of the substance in cal/g.
T(C)
70
50
1
-
-
-
-
-
-20
- - I
1 - - - - - -
-
- -
-
- -
Q (kcal)
-100
-
40
90
139
439
443