The latent of heat vaporization according to the given data in the graph is 20 J/g. The correct option is 2.
What is latent heat of vaporization?
It is the amount of heat required to change the phase of a substance from its liquid state to gaseous state without change the temperature.
Latent heat is ratio of the amount of heat absorbed to mass of substance.
In this case;
Mass of the substance = 20 g
Heat absorbed as the substance boils is 400 J (1000 J - 600 J)
Latent heat of vaporization = Quantity of Heat / Mass
= 400 Joules ÷ 20 g
= 20 J/g
Thus, the latent heat of vaporization is 20 J/g. The correct option is 2.
Learn more about latent heat of vaporization.
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