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A block of ice at temperature -20^@ C is...

A block of ice at temperature `-20^@ C` is slowly heated and converted to steam at `100^@ `C. Which of the following diagram is most appropriate?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
A
when heat is supplied the temperature of ice increase from `-20^@C ` to ` 0^@ C `. It is represented by a straight line inclined to heat axis At `0^@ C` the heat is used in converting ice into water at `0^@C ` . It is represented by horizontal straight portion . After that , heat is supplied to increase the temperature of water from `0^@C ` to `100^@ C ` . It is represented by a straight line incline to heat axis .At `100^@C ` , the heat is used in converting water into steam at `100^@ C` .It is represented by horizontal straight line .
hence option (a) is correct .
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