A block of ice, initially at -20^(@)C, is heated a steady rate until the temperature of the sample reaches 120^(@)C. Which of the following graphs best illustrates the temperature of the sample as a function of time?

A block of ice, initially at -20^(@)C, is heated a steady rate until t

1.	A block of ice, initially at -20^(@)C, is heated a steady rate until the temperature of the sample reaches 120^(@)C. Which of the following graphs best illustrates the temperature of the sample as a function of time?
Answer» Solution :ICE melts at `0^(@)C` and boils at `100^(@)C` during these phase TRANSITIONS, the temperature remains constant. THEREFORE, the GRAPH of the sample's temperature must be MOMENTARILY flat at both `0^(@)C` and at `100^(@)C`.

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A block of ice, initially at -20^(@)C, is heated a steady rate until the temperature of the sample reaches 120^(@)C. Which of the following graphs best illustrates the temperature of the sample as a function of time?

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