What is the latent heat of vaporization of water if 540 J of energy is required

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Question: What is the latent heat of vaporization of water if 540 J of energy is required to convert 100 g of water at 100°C to steam? (2021)

Options:

Correct Answer: 540 J/g

Exam Year: 2021

Solution:

Latent heat of vaporization (L) = Q/m = 540 J / 100 g = 5.4 J/g.

What is the latent heat of vaporization of water if 540 J of energy is required to convert 100 g of water at 100°C to steam? (2021)

What is the latent heat of vaporization of water if 540 J of energy is required to convert 100 g of water at 100°C to steam? (2021)

Step 1: Understand the problem. We need to find the latent heat of vaporization of water.
Step 2: Identify the given values. We have 540 J of energy (Q) and 100 g of water (m).
Step 3: Recall the formula for latent heat of vaporization: L = Q / m.
Step 4: Substitute the values into the formula: L = 540 J / 100 g.
Step 5: Perform the division: 540 J divided by 100 g equals 5.4 J/g.
Step 6: Conclude that the latent heat of vaporization of water is 5.4 J/g.

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