Question

The given graph shows the heating curve for a substance. The temperature rise with time as the substance is heated.
a. What is the physical state of substance at the points 1, 2, 3, 4, 5?
b. What is the melting point of substance?
c. What is the boiling point of substance?
d. What happens to the temperature while the substance is changing state?
e. Name the substance depicted in the graph.

Answer 1

Answer:

Please Attach Graph and Then Post Question

Answer 2

Answer:

(a) At point A : The substancve is in the solid state.

At point B : The substance has started has started melting. It exists both in the solid and liquid states.

At point C : The substace is in the liquid state.

At point D : The substance has started boiling. It exists both in the liquid and gaseous states.

(b) The melting point of the substance is 15∘C.

(c) The melting point of the substance is 110∘C.

(d) The temperature remains the same during the chage of state.

(e) Had substance been wagter, its melting point should have been 0∘C and boiling point 100∘C. It is therefore, not water.