Question

The following line graph shows the change in temperature of a block of ice when heated.

Study the above graph carefully and answer the questions given below:
(i) For how many seconds did the ice block have no change in temperature?

(ii) For how long was there a change in temperature?

(iii) After how many seconds of heating did the temperature become constant at 100° C?

(iv) What was the temperature after 25 seconds?

(v) What will be the temperature after 1.5 minutes? Justify your answer.

Answer 1

(i) The ice block had no change for 20 seconds.
(ii) There was a change in the ttemperature for 30 seconds
(iii) After 50 second, the temperture became constant at 100⁰ c.
(iv) The temperature after 25 second was 18⁰ c.
(v) The temperature after 1.5 min will be 100⁰ c as it is uniform after 50 seconds.