Question

Fig 11. 11 shows the variation in temperature with time when some wax cools from the liquid phase to the solid phase.

(i) In which part of the curve, the wax is in liquid phase?

(ii) What does the part QS of the curve represent?

(iii) In which part of the curve, the wax will be the in the liquid as well as solid phase?

(iv) In which part of the curve, the wax is in solid phase?

Answer 1

(i) In part PQ, the wax is in liquid phase.

(ii) In the part QS, temperature remains constant with time, and hence, this part of the curve     represents freezing.

(iii) In part QS, the wax will be in the liquid as well as solid phase.

(iv) In part ST, the wax is in solid phase.