Question:
Heat supplied to a block of ice at \(0^{\circ}C\) converts it into steam at \(100^{\circ}C\). The curve that represents this change of state is.
Heat supplied to a block of ice at \(0^{\circ}C\) converts it into steam at \(100^{\circ}C\). The curve that represents this change of state is.
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Horizontal lines in a heating curve always indicate a phase change.
Updated On: Apr 27, 2026
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The Correct Option is A
Solution and Explanation
Step 1: Concept
During a change of phase (melting or boiling), the temperature remains constant while heat is absorbed (Latent Heat).
Step 2: Meaning
The heating curve will show horizontal segments at $0^{\circ}C$ (melting) and $100^{\circ}C$ (boiling).
Step 3: Analysis
Graph A represents the melting of ice at $0^{\circ}C$ (first plateau), the warming of water to $100^{\circ}C$ (sloping line), and the boiling of water at $100^{\circ}C$ (second plateau).
Step 4: Conclusion
Hence, option A is the correct representative curve.
Final Answer: (A)
During a change of phase (melting or boiling), the temperature remains constant while heat is absorbed (Latent Heat).
Step 2: Meaning
The heating curve will show horizontal segments at $0^{\circ}C$ (melting) and $100^{\circ}C$ (boiling).
Step 3: Analysis
Graph A represents the melting of ice at $0^{\circ}C$ (first plateau), the warming of water to $100^{\circ}C$ (sloping line), and the boiling of water at $100^{\circ}C$ (second plateau).
Step 4: Conclusion
Hence, option A is the correct representative curve.
Final Answer: (A)
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