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 0°C?
(d) What was the temperature after 25 seconds?
(e) What will be the temperature after 1.5 minutes? Justify your answer.
Solution:
(a)The ice block did not have change in temperature for 20 seconds
(b)There was change in temperature for 30 seconds
(c ) After 50 seconds the temperature became constant at 100°C
(d) Temperature after 25 seconds was 20°C
(e) 1.5 minutes means 90 seconds. After 50 seconds temperature becomes constant at 100°C therefore temperature after 1.5 minutes will be 100°C.
✦ Try This: 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 35 seconds?
(e) What will be the temperature after 1.2 minutes? Justify your answer.
(a)The ice block did not have change in temperature for 30 seconds
(b)There was change in temperature for 10 seconds
(c) After 50 seconds the temperature became constant at 100°C
(d) Temperature after 35 seconds was 48°C
(e) 1.5 minutes means 90 seconds. After 50 seconds temperature becomes constant at 100°C, therefore temperature after 1.5 minutes will be 100°C.
☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 15
NCERT Exemplar Class 8 Maths Chapter 12 Problem 68
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 0°C? (d) What was the temperature after 25 seconds? (e) What will be the temperature after 1.5 minutes? Justify your answer.
Summary:
The graph given in the problem statement gives the variation of temperature of the ice-block with time.
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