Q.

Liquid oxygen at 50 K is heated to 300 K at constant pressure of I atm. The rate of heating is constant. Which one of the following graphs represents the variation of temperature with time?

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a

b

c

d

answer is B.

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Detailed Solution

Initially liquid oxygen will gain the temperature up to its boiling temperature, then it changes its state of gas. After this again its temperature will increase, so corresponding graph will be option (2).
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