First slide
Change of state
Question

Liquid oxygen at 50K is heated to 300K at constant pressure of 1atm. The rate of heating is constant. Which of the following graphs represents the variation of temperature with time? 

Moderate
Solution

In the first phase temperature of liquid oxygen will increase. In the second phase, when liquid oxygen changes to gas, temperature will remain constant. In the third phase, the temperature of oxygen in gaseous state will farther increase

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