Question

Calculate the Latent Heat of Vaporization. (Please see picture attached)

Answer 1

Answer:

20 J/g

Explanation:

In this question, we are required to determine the latent heat of vaporization

• To answer the question, we need to ask ourselves the questions:

What is latent heat of vaporization?

• It is the amount of heat required to change a substance from its liquid state to gaseous state without change in temperature.

• It is the amount of heat absorbed by a substance as it boils.

How do we calculate the latent heat of vaporization?

• Latent heat is calculated by dividing the amount of heat absorbed by the mass of the substance.

In this case;

• Mass of the substance = 20 g
• Heat absorbed as the substance boils is 400 J (1000 J - 600 J)

Thus,

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