What is the latent heat of vaporization if 500 g of water at 100°C is converted

Practice Questions

Q1
What is the latent heat of vaporization if 500 g of water at 100°C is converted to steam at the same temperature, absorbing 2260 kJ of heat? (2023)
  1. 2260 J/g
  2. 450 J/g
  3. 334 J/g
  4. 1000 J/g

Questions & Step-by-Step Solutions

What is the latent heat of vaporization if 500 g of water at 100°C is converted to steam at the same temperature, absorbing 2260 kJ of heat? (2023)
  • Step 1: Understand the problem. We need to find the latent heat of vaporization (L) of water when it is converted to steam.
  • Step 2: Identify the given values. We have 500 grams of water and it absorbs 2260 kJ of heat.
  • Step 3: Convert the heat absorbed from kJ to J. Since 1 kJ = 1000 J, we have 2260 kJ = 2260000 J.
  • Step 4: Use the formula for latent heat of vaporization: L = Q / m, where Q is the heat absorbed and m is the mass of the water.
  • Step 5: Substitute the values into the formula. L = 2260000 J / 500 g.
  • Step 6: Calculate the result. L = 4520 J/g.
  • Step 7: Convert the result to kJ/g if needed. Since 1 kJ = 1000 J, L = 4.52 kJ/g.
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