The following graph shows the change in temperature of a block of ice when heated. Use the graph to answer the following questions:

A) For how many seconds did the ice block have no change in temperature?

B) For how long was there a change in temperature?

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

D) What was the temperature after 25 seconds?

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

A) From the given graph , we can see that ,from 0 to 20 seconds there is no change in the temperature of the block.

B) From the given graph , we can see that , the change in temperature was from 20 to 50 seconds ie. for (50-20) = 30 seconds.

C) From the given graph , we can see that, after heating for 50 seconds , the temperature became constant at 100°C.

D) From the given graph , we can see that , the temperature after 25 seconds was 20°C.

E) From the given graph , we can see that , the temperature after 50 seconds of heating remains constant at 100°C till infinite time. So we can say that the temperature after 1.5 minutes will be 100°C.