Question
Explain the following temperature vs time graph.
✓
Answer
i. The given temperature $v / s$ time graph demonstrates the behaviour of water when heated continuously and uniformly.
ii. a. Line segment AB indicates temperature of ice remaining constant at $0^{\circ} C$ for certain period of time (about 4 minutes).
b. This means, amount of heat (latent heat of fusion) supplied to ice is entirely used for changing its state from solid to liquid.
c. Thus, line segment AB denotes conversion of ice at $0^{\circ} C$ into water at $0^{\circ} C$.
iii. Line segment BC indicates continuous rise in temperature of water from $0^{\circ} C$ to $100^{\circ} C$.
iv. a. At point C , boiling point of water is reached and heat energy (latent heat of vaporisation) supplied further is used to convert water into steam.
b. During this transformation, temperature remains unchanged as represented by line segment CD.
c. Thus, line segment CD denotes conversion of water at $100^{\circ} C$ into steam at $100^{\circ} C$.
ii. a. Line segment AB indicates temperature of ice remaining constant at $0^{\circ} C$ for certain period of time (about 4 minutes).
b. This means, amount of heat (latent heat of fusion) supplied to ice is entirely used for changing its state from solid to liquid.
c. Thus, line segment AB denotes conversion of ice at $0^{\circ} C$ into water at $0^{\circ} C$.
iii. Line segment BC indicates continuous rise in temperature of water from $0^{\circ} C$ to $100^{\circ} C$.
iv. a. At point C , boiling point of water is reached and heat energy (latent heat of vaporisation) supplied further is used to convert water into steam.
b. During this transformation, temperature remains unchanged as represented by line segment CD.
c. Thus, line segment CD denotes conversion of water at $100^{\circ} C$ into steam at $100^{\circ} C$.
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